diff --git a/dlls/mshtml/binding.h b/dlls/mshtml/binding.h
index 42560ea57c0..1366d98e6d1 100644
--- a/dlls/mshtml/binding.h
+++ b/dlls/mshtml/binding.h
@@ -43,7 +43,7 @@ typedef struct {
     nsIURI *referrer;
     char *content_type;
     char *charset;
-    PRUint32 response_status;
+    UINT32 response_status;
     REQUEST_METHOD request_method;
     struct list response_headers;
     struct list request_headers;
diff --git a/dlls/mshtml/editor.c b/dlls/mshtml/editor.c
index ccbdd597d91..dbb2d935a62 100644
--- a/dlls/mshtml/editor.c
+++ b/dlls/mshtml/editor.c
@@ -215,7 +215,7 @@ static nsISelection *get_ns_selection(HTMLDocument *This)
 static void remove_child_attr(nsIDOMElement *elem, LPCWSTR tag, nsAString *attr_str)
 {
     cpp_bool has_children;
-    PRUint32 child_cnt, i;
+    UINT32 child_cnt, i;
     nsIDOMNode *child_node;
     nsIDOMNodeList *node_list;
     UINT16 node_type;
@@ -408,7 +408,7 @@ static void handle_arrow_key(HTMLDocument *This, nsIDOMKeyEvent *event, const ch
 void handle_edit_event(HTMLDocument *This, nsIDOMEvent *event)
 {
     nsIDOMKeyEvent *key_event;
-    PRUint32 code;
+    UINT32 code;
 
     nsIDOMEvent_QueryInterface(event, &IID_nsIDOMKeyEvent, (void**)&key_event);
 
diff --git a/dlls/mshtml/htmldoc.c b/dlls/mshtml/htmldoc.c
index 5fc9560890c..1dc35ae88c1 100644
--- a/dlls/mshtml/htmldoc.c
+++ b/dlls/mshtml/htmldoc.c
@@ -1666,7 +1666,7 @@ static HRESULT dispid_from_elem_name(HTMLDocumentNode *This, BSTR name, DISPID *
 {
     nsIDOMNodeList *node_list;
     nsAString name_str;
-    PRUint32 len;
+    UINT32 len;
     unsigned i;
     nsresult nsres;
 
diff --git a/dlls/mshtml/htmlelem.c b/dlls/mshtml/htmlelem.c
index 8fba26d9882..6867a1733ad 100644
--- a/dlls/mshtml/htmlelem.c
+++ b/dlls/mshtml/htmlelem.c
@@ -1649,7 +1649,7 @@ HRESULT HTMLElement_handle_event(HTMLDOMNode *iface, DWORD eid, nsIDOMEvent *eve
 
         nsres = nsIDOMEvent_QueryInterface(event, &IID_nsIDOMKeyEvent, (void**)&key_event);
         if(NS_SUCCEEDED(nsres)) {
-            PRUint32 code = 0;
+            UINT32 code = 0;
 
             nsIDOMKeyEvent_GetKeyCode(key_event, &code);
 
@@ -1716,7 +1716,7 @@ static HRESULT HTMLElement_populate_props(DispatchEx *dispex)
     BSTR name;
     VARIANT value;
     unsigned i;
-    PRUint32 len;
+    UINT32 len;
     DISPID id;
     nsresult nsres;
     HRESULT hres;
diff --git a/dlls/mshtml/htmlelemcol.c b/dlls/mshtml/htmlelemcol.c
index 39e259c2718..102a438d208 100644
--- a/dlls/mshtml/htmlelemcol.c
+++ b/dlls/mshtml/htmlelemcol.c
@@ -496,7 +496,7 @@ static void create_all_list(HTMLDocumentNode *doc, HTMLDOMNode *elem, elem_vecto
 {
     nsIDOMNodeList *nsnode_list;
     nsIDOMNode *iter;
-    PRUint32 list_len = 0, i;
+    UINT32 list_len = 0, i;
     nsresult nsres;
     HRESULT hres;
 
@@ -550,7 +550,7 @@ IHTMLElementCollection *create_all_collection(HTMLDOMNode *node, BOOL include_ro
 
 IHTMLElementCollection *create_collection_from_nodelist(HTMLDocumentNode *doc, nsIDOMNodeList *nslist)
 {
-    PRUint32 length = 0, i;
+    UINT32 length = 0, i;
     HTMLDOMNode *node;
     elem_vector_t buf;
     HRESULT hres;
@@ -585,7 +585,7 @@ IHTMLElementCollection *create_collection_from_nodelist(HTMLDocumentNode *doc, n
 
 IHTMLElementCollection *create_collection_from_htmlcol(HTMLDocumentNode *doc, nsIDOMHTMLCollection *nscol)
 {
-    PRUint32 length = 0, i;
+    UINT32 length = 0, i;
     elem_vector_t buf;
     HTMLDOMNode *node;
     HRESULT hres = S_OK;
diff --git a/dlls/mshtml/htmlevent.c b/dlls/mshtml/htmlevent.c
index f849d606109..98e592d611b 100644
--- a/dlls/mshtml/htmlevent.c
+++ b/dlls/mshtml/htmlevent.c
@@ -542,7 +542,7 @@ static HRESULT WINAPI HTMLEventObj_put_keyCode(IHTMLEventObj *iface, LONG v)
 static HRESULT WINAPI HTMLEventObj_get_keyCode(IHTMLEventObj *iface, LONG *p)
 {
     HTMLEventObj *This = impl_from_IHTMLEventObj(iface);
-    PRUint32 key_code = 0;
+    UINT32 key_code = 0;
 
     TRACE("(%p)->(%p)\n", This, p);
 
diff --git a/dlls/mshtml/htmlform.c b/dlls/mshtml/htmlform.c
index c48415a4831..a66f6e45a8d 100644
--- a/dlls/mshtml/htmlform.c
+++ b/dlls/mshtml/htmlform.c
@@ -510,7 +510,7 @@ static HRESULT HTMLFormElement_get_dispid(HTMLDOMNode *iface,
     HTMLFormElement *This = impl_from_HTMLDOMNode(iface);
     nsIDOMHTMLCollection *elements;
     nsAString nsname, nsstr;
-    PRUint32 len, i;
+    UINT32 len, i;
     nsresult nsres;
     HRESULT hres = DISP_E_UNKNOWNNAME;
 
diff --git a/dlls/mshtml/htmlimg.c b/dlls/mshtml/htmlimg.c
index e5f94d1ff76..88827ea4c94 100644
--- a/dlls/mshtml/htmlimg.c
+++ b/dlls/mshtml/htmlimg.c
@@ -494,7 +494,7 @@ static HRESULT WINAPI HTMLImgElement_put_width(IHTMLImgElement *iface, LONG v)
 static HRESULT WINAPI HTMLImgElement_get_width(IHTMLImgElement *iface, LONG *p)
 {
     HTMLImgElement *This = impl_from_IHTMLImgElement(iface);
-    PRUint32 width;
+    UINT32 width;
     nsresult nsres;
 
     TRACE("(%p)->(%p)\n", This, p);
@@ -528,7 +528,7 @@ static HRESULT WINAPI HTMLImgElement_put_height(IHTMLImgElement *iface, LONG v)
 static HRESULT WINAPI HTMLImgElement_get_height(IHTMLImgElement *iface, LONG *p)
 {
     HTMLImgElement *This = impl_from_IHTMLImgElement(iface);
-    PRUint32 height;
+    UINT32 height;
     nsresult nsres;
 
     TRACE("(%p)->(%p)\n", This, p);
diff --git a/dlls/mshtml/htmlnode.c b/dlls/mshtml/htmlnode.c
index 2c804b68f3e..c6938924384 100644
--- a/dlls/mshtml/htmlnode.c
+++ b/dlls/mshtml/htmlnode.c
@@ -137,7 +137,7 @@ static HRESULT WINAPI HTMLDOMChildrenCollection_Invoke(IHTMLDOMChildrenCollectio
 static HRESULT WINAPI HTMLDOMChildrenCollection_get_length(IHTMLDOMChildrenCollection *iface, LONG *p)
 {
     HTMLDOMChildrenCollection *This = impl_from_IHTMLDOMChildrenCollection(iface);
-    PRUint32 length=0;
+    UINT32 length=0;
 
     TRACE("(%p)->(%p)\n", This, p);
 
@@ -158,7 +158,7 @@ static HRESULT WINAPI HTMLDOMChildrenCollection_item(IHTMLDOMChildrenCollection
     HTMLDOMChildrenCollection *This = impl_from_IHTMLDOMChildrenCollection(iface);
     nsIDOMNode *nsnode = NULL;
     HTMLDOMNode *node;
-    PRUint32 length=0;
+    UINT32 length=0;
     nsresult nsres;
     HRESULT hres;
 
@@ -212,7 +212,7 @@ static HRESULT HTMLDOMChildrenCollection_get_dispid(DispatchEx *dispex, BSTR nam
     HTMLDOMChildrenCollection *This = impl_from_DispatchEx(dispex);
     WCHAR *ptr;
     DWORD idx=0;
-    PRUint32 len = 0;
+    UINT32 len = 0;
 
     for(ptr = name; *ptr && isdigitW(*ptr); ptr++)
         idx = idx*10 + (*ptr-'0');
diff --git a/dlls/mshtml/htmlselect.c b/dlls/mshtml/htmlselect.c
index ff609ddf32b..ea96c851e47 100644
--- a/dlls/mshtml/htmlselect.c
+++ b/dlls/mshtml/htmlselect.c
@@ -415,7 +415,7 @@ static HRESULT WINAPI HTMLSelectElement_put_length(IHTMLSelectElement *iface, LO
 static HRESULT WINAPI HTMLSelectElement_get_length(IHTMLSelectElement *iface, LONG *p)
 {
     HTMLSelectElement *This = impl_from_IHTMLSelectElement(iface);
-    PRUint32 length = 0;
+    UINT32 length = 0;
     nsresult nsres;
 
     TRACE("(%p)->(%p)\n", This, p);
diff --git a/dlls/mshtml/htmlstylesheet.c b/dlls/mshtml/htmlstylesheet.c
index 3b855e5a500..e0c74bcf8b6 100644
--- a/dlls/mshtml/htmlstylesheet.c
+++ b/dlls/mshtml/htmlstylesheet.c
@@ -148,7 +148,7 @@ static HRESULT WINAPI HTMLStyleSheetRulesCollection_get_length(IHTMLStyleSheetRu
         LONG *p)
 {
     HTMLStyleSheetRulesCollection *This = impl_from_IHTMLStyleSheetRulesCollection(iface);
-    PRUint32 len = 0;
+    UINT32 len = 0;
 
     TRACE("(%p)->(%p)\n", This, p);
 
@@ -294,7 +294,7 @@ static HRESULT WINAPI HTMLStyleSheetsCollection_get_length(IHTMLStyleSheetsColle
         LONG *p)
 {
     HTMLStyleSheetsCollection *This = impl_from_IHTMLStyleSheetsCollection(iface);
-    PRUint32 len = 0;
+    UINT32 len = 0;
 
     TRACE("(%p)->(%p)\n", This, p);
 
diff --git a/dlls/mshtml/htmltextnode.c b/dlls/mshtml/htmltextnode.c
index 1be260fee9f..feb7dc0e76e 100644
--- a/dlls/mshtml/htmltextnode.c
+++ b/dlls/mshtml/htmltextnode.c
@@ -122,7 +122,7 @@ static HRESULT WINAPI HTMLDOMTextNode_toString(IHTMLDOMTextNode *iface, BSTR *St
 static HRESULT WINAPI HTMLDOMTextNode_get_length(IHTMLDOMTextNode *iface, LONG *p)
 {
     HTMLDOMTextNode *This = impl_from_IHTMLDOMTextNode(iface);
-    PRUint32 length = 0;
+    UINT32 length = 0;
     nsresult nsres;
 
     TRACE("(%p)->(%p)\n", This, p);
diff --git a/dlls/mshtml/htmlwindow.c b/dlls/mshtml/htmlwindow.c
index 0318002c5da..9e3cb7255d3 100644
--- a/dlls/mshtml/htmlwindow.c
+++ b/dlls/mshtml/htmlwindow.c
@@ -323,11 +323,11 @@ static HRESULT WINAPI HTMLWindow2_Invoke(IHTMLWindow2 *iface, DISPID dispIdMembe
             pDispParams, pVarResult, pExcepInfo, puArgErr);
 }
 
-static HRESULT get_frame_by_index(HTMLOuterWindow *This, PRUint32 index, HTMLOuterWindow **ret)
+static HRESULT get_frame_by_index(HTMLOuterWindow *This, UINT32 index, HTMLOuterWindow **ret)
 {
     nsIDOMWindowCollection *nsframes;
     nsIDOMWindow *nswindow;
-    PRUint32 length;
+    UINT32 length;
     nsresult nsres;
 
     nsres = nsIDOMWindow_GetFrames(This->nswindow, &nsframes);
@@ -363,7 +363,7 @@ HRESULT get_frame_by_name(HTMLOuterWindow *This, const WCHAR *name, BOOL deep, H
     HTMLOuterWindow *window = NULL;
     nsIDOMWindow *nswindow;
     nsAString name_str;
-    PRUint32 length, i;
+    UINT32 length, i;
     nsresult nsres;
     HRESULT hres = S_OK;
 
@@ -476,7 +476,7 @@ static HRESULT WINAPI HTMLWindow2_get_length(IHTMLWindow2 *iface, LONG *p)
 {
     HTMLWindow *This = impl_from_IHTMLWindow2(iface);
     nsIDOMWindowCollection *nscollection;
-    PRUint32 length;
+    UINT32 length;
     nsresult nsres;
 
     TRACE("(%p)->(%p)\n", This, p);
diff --git a/dlls/mshtml/mshtml_private.h b/dlls/mshtml/mshtml_private.h
index 678ef3ef5fd..75200c445e3 100644
--- a/dlls/mshtml/mshtml_private.h
+++ b/dlls/mshtml/mshtml_private.h
@@ -39,7 +39,7 @@
 #include "nsiface.h"
 
 #define NS_ERROR_GENERATE_FAILURE(module,code) \
-    ((nsresult) (((PRUint32)(1<<31)) | ((PRUint32)(module+0x45)<<16) | ((PRUint32)(code))))
+    ((nsresult) (((UINT32)(1<<31)) | ((UINT32)(module+0x45)<<16) | ((UINT32)(code))))
 
 #define NS_OK                     ((nsresult)0x00000000L)
 #define NS_ERROR_FAILURE          ((nsresult)0x80004005L)
@@ -793,13 +793,13 @@ void nsfree(void*) DECLSPEC_HIDDEN;
 
 void nsACString_InitDepend(nsACString*,const char*) DECLSPEC_HIDDEN;
 void nsACString_SetData(nsACString*,const char*) DECLSPEC_HIDDEN;
-PRUint32 nsACString_GetData(const nsACString*,const char**) DECLSPEC_HIDDEN;
+UINT32 nsACString_GetData(const nsACString*,const char**) DECLSPEC_HIDDEN;
 void nsACString_Finish(nsACString*) DECLSPEC_HIDDEN;
 
 BOOL nsAString_Init(nsAString*,const PRUnichar*) DECLSPEC_HIDDEN;
 void nsAString_InitDepend(nsAString*,const PRUnichar*) DECLSPEC_HIDDEN;
 void nsAString_SetData(nsAString*,const PRUnichar*) DECLSPEC_HIDDEN;
-PRUint32 nsAString_GetData(const nsAString*,const PRUnichar**) DECLSPEC_HIDDEN;
+UINT32 nsAString_GetData(const nsAString*,const PRUnichar**) DECLSPEC_HIDDEN;
 void nsAString_Finish(nsAString*) DECLSPEC_HIDDEN;
 HRESULT return_nsstr(nsresult,nsAString*,BSTR*) DECLSPEC_HIDDEN;
 
diff --git a/dlls/mshtml/navigate.c b/dlls/mshtml/navigate.c
index c44efca3ffe..72afc10f774 100644
--- a/dlls/mshtml/navigate.c
+++ b/dlls/mshtml/navigate.c
@@ -145,8 +145,8 @@ static nsresult NSAPI nsInputStream_Available(nsIInputStream *iface, PRUint64 *_
     return NS_ERROR_NOT_IMPLEMENTED;
 }
 
-static nsresult NSAPI nsInputStream_Read(nsIInputStream *iface, char *aBuf, PRUint32 aCount,
-                                         PRUint32 *_retval)
+static nsresult NSAPI nsInputStream_Read(nsIInputStream *iface, char *aBuf, UINT32 aCount,
+                                         UINT32 *_retval)
 {
     nsProtocolStream *This = impl_from_nsIInputStream(iface);
     DWORD read = aCount;
@@ -168,11 +168,11 @@ static nsresult NSAPI nsInputStream_Read(nsIInputStream *iface, char *aBuf, PRUi
 }
 
 static nsresult NSAPI nsInputStream_ReadSegments(nsIInputStream *iface,
-        nsresult (WINAPI *aWriter)(nsIInputStream*,void*,const char*,PRUint32,PRUint32,PRUint32*),
-        void *aClousure, PRUint32 aCount, PRUint32 *_retval)
+        nsresult (WINAPI *aWriter)(nsIInputStream*,void*,const char*,UINT32,UINT32,UINT32*),
+        void *aClousure, UINT32 aCount, UINT32 *_retval)
 {
     nsProtocolStream *This = impl_from_nsIInputStream(iface);
-    PRUint32 written = 0;
+    UINT32 written = 0;
     nsresult nsres;
 
     TRACE("(%p)->(%p %p %d %p)\n", This, aWriter, aClousure, aCount, _retval);
@@ -1002,7 +1002,7 @@ HRESULT bind_mon_to_wstr(HTMLInnerWindow *window, IMoniker *mon, WCHAR **ret)
 static HRESULT read_post_data_stream(nsChannelBSC *This, nsChannel *nschannel)
 {
     PRUint64 available = 0;
-    PRUint32 data_len = 0;
+    UINT32 data_len = 0;
     char *data, *post_data;
     nsresult nsres;
     HRESULT hres = S_OK;
diff --git a/dlls/mshtml/nsembed.c b/dlls/mshtml/nsembed.c
index 215bb383cb6..7691849b0fa 100644
--- a/dlls/mshtml/nsembed.c
+++ b/dlls/mshtml/nsembed.c
@@ -53,6 +53,8 @@ WINE_DECLARE_DEBUG_CHANNEL(gecko);
 #define NS_STRING_CONTAINER_INIT_DEPEND  0x0002
 #define NS_CSTRING_CONTAINER_INIT_DEPEND 0x0002
 
+typedef UINT32 PRUint32;
+
 static nsresult (CDECL *NS_InitXPCOM2)(nsIServiceManager**,void*,void*);
 static nsresult (CDECL *NS_ShutdownXPCOM)(nsIServiceManager*);
 static nsresult (CDECL *NS_GetComponentRegistrar)(nsIComponentRegistrar**);
@@ -798,7 +800,7 @@ void nsACString_SetData(nsACString *str, const char *data)
     NS_CStringSetData(str, data, PR_UINT32_MAX);
 }
 
-PRUint32 nsACString_GetData(const nsACString *str, const char **data)
+UINT32 nsACString_GetData(const nsACString *str, const char **data)
 {
     return NS_CStringGetData(str, data, NULL);
 }
@@ -827,7 +829,7 @@ void nsAString_SetData(nsAString *str, const PRUnichar *data)
     NS_StringSetData(str, data, PR_UINT32_MAX);
 }
 
-PRUint32 nsAString_GetData(const nsAString *str, const PRUnichar **data)
+UINT32 nsAString_GetData(const nsAString *str, const PRUnichar **data)
 {
     return NS_StringGetData(str, data, NULL);
 }
@@ -960,7 +962,7 @@ static HRESULT nsnode_to_nsstring_rec(nsIContentSerializer *serializer, nsIDOMNo
     }
 
     if(has_children) {
-        PRUint32 child_cnt, i;
+        UINT32 child_cnt, i;
         nsIDOMNode *child_node;
 
         nsIDOMNode_GetChildNodes(nsnode, &node_list);
@@ -1273,7 +1275,7 @@ static nsrefcnt NSAPI nsWebBrowserChrome_Release(nsIWebBrowserChrome *iface)
 }
 
 static nsresult NSAPI nsWebBrowserChrome_SetStatus(nsIWebBrowserChrome *iface,
-        PRUint32 statusType, const PRUnichar *status)
+        UINT32 statusType, const PRUnichar *status)
 {
     NSContainer *This = impl_from_nsIWebBrowserChrome(iface);
     TRACE("(%p)->(%d %s)\n", This, statusType, debugstr_w(status));
@@ -1310,7 +1312,7 @@ static nsresult NSAPI nsWebBrowserChrome_SetWebBrowser(nsIWebBrowserChrome *ifac
 }
 
 static nsresult NSAPI nsWebBrowserChrome_GetChromeFlags(nsIWebBrowserChrome *iface,
-        PRUint32 *aChromeFlags)
+        UINT32 *aChromeFlags)
 {
     NSContainer *This = impl_from_nsIWebBrowserChrome(iface);
     WARN("(%p)->(%p)\n", This, aChromeFlags);
@@ -1318,7 +1320,7 @@ static nsresult NSAPI nsWebBrowserChrome_GetChromeFlags(nsIWebBrowserChrome *ifa
 }
 
 static nsresult NSAPI nsWebBrowserChrome_SetChromeFlags(nsIWebBrowserChrome *iface,
-        PRUint32 aChromeFlags)
+        UINT32 aChromeFlags)
 {
     NSContainer *This = impl_from_nsIWebBrowserChrome(iface);
     WARN("(%p)->(%08x)\n", This, aChromeFlags);
@@ -1407,7 +1409,7 @@ static nsrefcnt NSAPI nsContextMenuListener_Release(nsIContextMenuListener *ifac
 }
 
 static nsresult NSAPI nsContextMenuListener_OnShowContextMenu(nsIContextMenuListener *iface,
-        PRUint32 aContextFlags, nsIDOMEvent *aEvent, nsIDOMNode *aNode)
+        UINT32 aContextFlags, nsIDOMEvent *aEvent, nsIDOMNode *aNode)
 {
     NSContainer *This = impl_from_nsIContextMenuListener(iface);
     nsIDOMMouseEvent *event;
@@ -1667,7 +1669,7 @@ static nsrefcnt NSAPI nsEmbeddingSiteWindow_Release(nsIEmbeddingSiteWindow *ifac
 }
 
 static nsresult NSAPI nsEmbeddingSiteWindow_SetDimensions(nsIEmbeddingSiteWindow *iface,
-        PRUint32 flags, LONG x, LONG y, LONG cx, LONG cy)
+        UINT32 flags, LONG x, LONG y, LONG cx, LONG cy)
 {
     NSContainer *This = impl_from_nsIEmbeddingSiteWindow(iface);
     WARN("(%p)->(%08x %d %d %d %d)\n", This, flags, x, y, cx, cy);
@@ -1675,7 +1677,7 @@ static nsresult NSAPI nsEmbeddingSiteWindow_SetDimensions(nsIEmbeddingSiteWindow
 }
 
 static nsresult NSAPI nsEmbeddingSiteWindow_GetDimensions(nsIEmbeddingSiteWindow *iface,
-        PRUint32 flags, LONG *x, LONG *y, LONG *cx, LONG *cy)
+        UINT32 flags, LONG *x, LONG *y, LONG *cx, LONG *cy)
 {
     NSContainer *This = impl_from_nsIEmbeddingSiteWindow(iface);
     WARN("(%p)->(%08x %p %p %p %p)\n", This, flags, x, y, cx, cy);
diff --git a/dlls/mshtml/nsiface.idl b/dlls/mshtml/nsiface.idl
index 31bd347e235..d12b4659f33 100644
--- a/dlls/mshtml/nsiface.idl
+++ b/dlls/mshtml/nsiface.idl
@@ -43,7 +43,6 @@ typedef REFIID nsIIDRef;
 typedef nsIIDRef nsCIDRef;
 
 typedef WCHAR PRUnichar;
-typedef ULONG PRUint32;
 typedef ULONGLONG PRUint64;
 
 /*
@@ -57,7 +56,7 @@ typedef ULONGLONG PRUint64;
 
 #define uint8_t UINT8
 #define uint16_t UINT16
-#define uint32_t PRUint32
+#define uint32_t UINT32
 #define uint64_t PRUint64
 
 typedef uint64_t DOMTimeStamp;
diff --git a/dlls/mshtml/nsio.c b/dlls/mshtml/nsio.c
index 9e35921406b..96191f7cd81 100644
--- a/dlls/mshtml/nsio.c
+++ b/dlls/mshtml/nsio.c
@@ -1127,14 +1127,14 @@ static nsresult NSAPI nsChannel_AsyncOpen(nsIHttpChannel *iface, nsIStreamListen
     return nsres;
 }
 
-static nsresult NSAPI nsChannel_GetContentDisposition(nsIHttpChannel *iface, PRUint32 *aContentDisposition)
+static nsresult NSAPI nsChannel_GetContentDisposition(nsIHttpChannel *iface, UINT32 *aContentDisposition)
 {
     nsChannel *This = impl_from_nsIHttpChannel(iface);
     FIXME("(%p)->(%p)\n", This, aContentDisposition);
     return NS_ERROR_NOT_IMPLEMENTED;
 }
 
-static nsresult NSAPI nsChannel_SetContentDisposition(nsIHttpChannel *iface, PRUint32 aContentDisposition)
+static nsresult NSAPI nsChannel_SetContentDisposition(nsIHttpChannel *iface, UINT32 aContentDisposition)
 {
     nsChannel *This = impl_from_nsIHttpChannel(iface);
     FIXME("(%p)->(%u)\n", This, aContentDisposition);
@@ -1270,7 +1270,7 @@ static nsresult NSAPI nsChannel_SetAllowPipelining(nsIHttpChannel *iface, cpp_bo
     return NS_ERROR_NOT_IMPLEMENTED;
 }
 
-static nsresult NSAPI nsChannel_GetRedirectionLimit(nsIHttpChannel *iface, PRUint32 *aRedirectionLimit)
+static nsresult NSAPI nsChannel_GetRedirectionLimit(nsIHttpChannel *iface, UINT32 *aRedirectionLimit)
 {
     nsChannel *This = impl_from_nsIHttpChannel(iface);
 
@@ -1279,7 +1279,7 @@ static nsresult NSAPI nsChannel_GetRedirectionLimit(nsIHttpChannel *iface, PRUin
     return NS_ERROR_NOT_IMPLEMENTED;
 }
 
-static nsresult NSAPI nsChannel_SetRedirectionLimit(nsIHttpChannel *iface, PRUint32 aRedirectionLimit)
+static nsresult NSAPI nsChannel_SetRedirectionLimit(nsIHttpChannel *iface, UINT32 aRedirectionLimit)
 {
     nsChannel *This = impl_from_nsIHttpChannel(iface);
 
@@ -1288,7 +1288,7 @@ static nsresult NSAPI nsChannel_SetRedirectionLimit(nsIHttpChannel *iface, PRUin
     return NS_ERROR_NOT_IMPLEMENTED;
 }
 
-static nsresult NSAPI nsChannel_GetResponseStatus(nsIHttpChannel *iface, PRUint32 *aResponseStatus)
+static nsresult NSAPI nsChannel_GetResponseStatus(nsIHttpChannel *iface, UINT32 *aResponseStatus)
 {
     nsChannel *This = impl_from_nsIHttpChannel(iface);
 
@@ -1571,7 +1571,7 @@ static nsresult NSAPI nsHttpChannelInternal_SetDocumentURI(nsIHttpChannelInterna
     return NS_ERROR_NOT_IMPLEMENTED;
 }
 
-static nsresult NSAPI nsHttpChannelInternal_GetRequestVersion(nsIHttpChannelInternal *iface, PRUint32 *major, PRUint32 *minor)
+static nsresult NSAPI nsHttpChannelInternal_GetRequestVersion(nsIHttpChannelInternal *iface, UINT32 *major, UINT32 *minor)
 {
     nsChannel *This = impl_from_nsIHttpChannelInternal(iface);
 
@@ -1580,7 +1580,7 @@ static nsresult NSAPI nsHttpChannelInternal_GetRequestVersion(nsIHttpChannelInte
     return NS_ERROR_NOT_IMPLEMENTED;
 }
 
-static nsresult NSAPI nsHttpChannelInternal_GetResponseVersion(nsIHttpChannelInternal *iface, PRUint32 *major, PRUint32 *minor)
+static nsresult NSAPI nsHttpChannelInternal_GetResponseVersion(nsIHttpChannelInternal *iface, UINT32 *major, UINT32 *minor)
 {
     nsChannel *This = impl_from_nsIHttpChannelInternal(iface);
 
@@ -2862,7 +2862,7 @@ static nsresult NSAPI nsStandardURL_SetMutable(nsIStandardURL *iface, cpp_bool a
     return NS_OK;
 }
 
-static nsresult NSAPI nsStandardURL_Init(nsIStandardURL *iface, PRUint32 aUrlType, LONG aDefaultPort,
+static nsresult NSAPI nsStandardURL_Init(nsIStandardURL *iface, UINT32 aUrlType, LONG aDefaultPort,
         const nsACString *aSpec, const char *aOriginCharset, nsIURI *aBaseURI)
 {
     nsWineURI *This = impl_from_nsIStandardURL(iface);
@@ -3109,7 +3109,7 @@ static nsresult NSAPI nsProtocolHandler_GetDefaultPort(nsIProtocolHandler *iface
 }
 
 static nsresult NSAPI nsProtocolHandler_GetProtocolFlags(nsIProtocolHandler *iface,
-                                                         PRUint32 *aProtocolFlags)
+                                                         UINT32 *aProtocolFlags)
 {
     nsProtocolHandler *This = impl_from_nsIProtocolHandler(iface);
 
@@ -3220,7 +3220,7 @@ static nsresult NSAPI nsIOService_GetProtocolHandler(nsIIOService *iface, const
 }
 
 static nsresult NSAPI nsIOService_GetProtocolFlags(nsIIOService *iface, const char *aScheme,
-                                                    PRUint32 *_retval)
+                                                    UINT32 *_retval)
 {
     TRACE("(%s %p)\n", debugstr_a(aScheme), _retval);
     return nsIIOService_GetProtocolFlags(nsio, aScheme, _retval);
@@ -3415,14 +3415,14 @@ static nsresult NSAPI nsNetUtil_ParseContentType(nsINetUtil *iface, const nsACSt
     return nsINetUtil_ParseContentType(net_util, aTypeHeader, aCharset, aHadCharset, aContentType);
 }
 
-static nsresult NSAPI nsNetUtil_ProtocolHasFlags(nsINetUtil *iface, nsIURI *aURI, PRUint32 aFlags, cpp_bool *_retval)
+static nsresult NSAPI nsNetUtil_ProtocolHasFlags(nsINetUtil *iface, nsIURI *aURI, UINT32 aFlags, cpp_bool *_retval)
 {
     TRACE("()\n");
 
     return nsINetUtil_ProtocolHasFlags(net_util, aURI, aFlags, _retval);
 }
 
-static nsresult NSAPI nsNetUtil_URIChainHasFlags(nsINetUtil *iface, nsIURI *aURI, PRUint32 aFlags, cpp_bool *_retval)
+static nsresult NSAPI nsNetUtil_URIChainHasFlags(nsINetUtil *iface, nsIURI *aURI, UINT32 aFlags, cpp_bool *_retval)
 {
     TRACE("(%p %08x %p)\n", aURI, aFlags, _retval);
 
@@ -3449,14 +3449,14 @@ static nsresult NSAPI nsNetUtil_NewSimpleNestedURI(nsINetUtil *iface, nsIURI *aU
 }
 
 static nsresult NSAPI nsNetUtil_EscapeString(nsINetUtil *iface, const nsACString *aString,
-                                             PRUint32 aEscapeType, nsACString *_retval)
+                                             UINT32 aEscapeType, nsACString *_retval)
 {
     TRACE("(%s %x %p)\n", debugstr_nsacstr(aString), aEscapeType, _retval);
 
     return nsINetUtil_EscapeString(net_util, aString, aEscapeType, _retval);
 }
 
-static nsresult NSAPI nsNetUtil_EscapeURL(nsINetUtil *iface, const nsACString *aStr, PRUint32 aFlags,
+static nsresult NSAPI nsNetUtil_EscapeURL(nsINetUtil *iface, const nsACString *aStr, UINT32 aFlags,
                                           nsACString *_retval)
 {
     TRACE("(%s %08x %p)\n", debugstr_nsacstr(aStr), aFlags, _retval);
@@ -3465,7 +3465,7 @@ static nsresult NSAPI nsNetUtil_EscapeURL(nsINetUtil *iface, const nsACString *a
 }
 
 static nsresult NSAPI nsNetUtil_UnescapeString(nsINetUtil *iface, const nsACString *aStr,
-                                               PRUint32 aFlags, nsACString *_retval)
+                                               UINT32 aFlags, nsACString *_retval)
 {
     TRACE("(%s %08x %p)\n", debugstr_nsacstr(aStr), aFlags, _retval);
 
diff --git a/dlls/mshtml/nsservice.c b/dlls/mshtml/nsservice.c
index 2eefcbe69bd..6d34f3fa08c 100644
--- a/dlls/mshtml/nsservice.c
+++ b/dlls/mshtml/nsservice.c
@@ -124,7 +124,7 @@ static nsresult NSAPI nsPromptService_ConfirmCheck(nsIPromptService *iface,
 
 static nsresult NSAPI nsPromptService_ConfirmEx(nsIPromptService *iface,
         nsIDOMWindow *aParent, const PRUnichar *aDialogTitle,
-        const PRUnichar *aText, PRUint32 aButtonFlags, const PRUnichar *aButton0Title,
+        const PRUnichar *aText, UINT32 aButtonFlags, const PRUnichar *aButton0Title,
         const PRUnichar *aButton1Title, const PRUnichar *aButton2Title,
         const PRUnichar *aCheckMsg, cpp_bool *aCheckState, LONG *_retval)
 {
@@ -185,7 +185,7 @@ static nsresult NSAPI nsPromptService_PromptPassword(nsIPromptService *iface,
 
 static nsresult NSAPI nsPromptService_Select(nsIPromptService *iface,
         nsIDOMWindow *aParent, const PRUnichar *aDialogTitle,
-        const PRUnichar *aText, PRUint32 aCount, const PRUnichar **aSelectList,
+        const PRUnichar *aText, UINT32 aCount, const PRUnichar **aSelectList,
         LONG *aOutSelection, cpp_bool *_retval)
 {
     FIXME("(%p %s %s %d %p %p %p)\n", aParent, debugstr_w(aDialogTitle),
diff --git a/dlls/mshtml/propbag.c b/dlls/mshtml/propbag.c
index 716f3837885..14cc55e40d2 100644
--- a/dlls/mshtml/propbag.c
+++ b/dlls/mshtml/propbag.c
@@ -273,7 +273,7 @@ static HRESULT fill_props(nsIDOMHTMLElement *nselem, PropertyBag *prop_bag)
     nsIDOMHTMLParamElement *nsparam;
     nsAString name_str, value_str;
     nsIDOMNodeList *params;
-    PRUint32 length, i;
+    UINT32 length, i;
     nsIDOMNode *nsnode;
     nsresult nsres;
     HRESULT hres = S_OK;
diff --git a/dlls/mshtml/script.c b/dlls/mshtml/script.c
index a212b991df3..3174bd289f0 100644
--- a/dlls/mshtml/script.c
+++ b/dlls/mshtml/script.c
@@ -1173,7 +1173,7 @@ void bind_event_scripts(HTMLDocumentNode *doc)
     nsIDOMNode *script_node;
     nsAString selector_str;
     IDispatch *event_disp;
-    PRUint32 length, i;
+    UINT32 length, i;
     WCHAR *event;
     nsresult nsres;
     HRESULT hres;
diff --git a/dlls/mshtml/txtrange.c b/dlls/mshtml/txtrange.c
index 813fad7b360..e88d9604445 100644
--- a/dlls/mshtml/txtrange.c
+++ b/dlls/mshtml/txtrange.c
@@ -56,7 +56,7 @@ typedef struct {
 typedef struct {
     UINT16 type;
     nsIDOMNode *node;
-    PRUint32 off;
+    UINT32 off;
     nsAString str;
     const PRUnichar *p;
 } dompos_t;
@@ -377,7 +377,7 @@ static nsIDOMNode *prev_node(HTMLTxtRange *This, nsIDOMNode *iter)
     return NULL;
 }
 
-static nsIDOMNode *get_child_node(nsIDOMNode *node, PRUint32 off)
+static nsIDOMNode *get_child_node(nsIDOMNode *node, UINT32 off)
 {
     nsIDOMNodeList *node_list;
     nsIDOMNode *ret = NULL;