diff --git a/dlls/slc/slc.c b/dlls/slc/slc.c
index e7416f10b55..1b02c9bf3d0 100644
--- a/dlls/slc/slc.c
+++ b/dlls/slc/slc.c
@@ -28,7 +28,14 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(slc);
 
-DWORD WINAPI SLGetWindowsInformationDWORD(LPCWSTR lpszValueName, LPDWORD pdwValue)
+HRESULT WINAPI SLGetWindowsInformation(LPCWSTR name, SLDATATYPE *type, UINT *val, LPBYTE *size)
+{
+    FIXME("(%s %p %p %p) stub\n", debugstr_w(name), type, val, size );
+
+    return SL_E_RIGHT_NOT_GRANTED;
+}
+
+HRESULT WINAPI SLGetWindowsInformationDWORD(LPCWSTR lpszValueName, LPDWORD pdwValue)
 {
     FIXME("(%s) stub\n", debugstr_w(lpszValueName) );
 
diff --git a/dlls/slc/slc.spec b/dlls/slc/slc.spec
index 45cd1ba73e7..af5545c6732 100644
--- a/dlls/slc/slc.spec
+++ b/dlls/slc/slc.spec
@@ -25,7 +25,7 @@
 @ stub SLGetSAMLicense
 @ stub SLGetSLIDList
 @ stub SLGetServiceInformation
-@ stub SLGetWindowsInformation
+@ stdcall SLGetWindowsInformation(wstr ptr ptr ptr)
 @ stdcall SLGetWindowsInformationDWORD(wstr ptr)
 @ stub SLInstallLicense
 @ stub SLInstallProofOfPurchase
diff --git a/include/slpublic.h b/include/slpublic.h
index a2c6d4222c1..c8bb559d2f3 100644
--- a/include/slpublic.h
+++ b/include/slpublic.h
@@ -29,7 +29,18 @@ extern "C" {
 #define SLCAPI DECLSPEC_IMPORT
 #endif
 
-SLCAPI DWORD WINAPI SLGetWindowsInformationDWORD(LPCWSTR lpszValueName, LPDWORD pdwValue);
+typedef enum _tagSLDATATYPE
+{
+    SL_DATA_NONE     = REG_NONE,
+    SL_DATA_SZ       = REG_SZ,
+    SL_DATA_DWORD    = REG_DWORD,
+    SL_DATA_BINARY   = REG_BINARY,
+    SL_DATA_MULTI_SZ = REG_MULTI_SZ,
+    SL_DATA_SUM      = 100,
+} SLDATATYPE;
+
+SLCAPI HRESULT WINAPI SLGetWindowsInformation(LPCWSTR, SLDATATYPE*, UINT*, LPBYTE*);
+SLCAPI HRESULT WINAPI SLGetWindowsInformationDWORD(LPCWSTR, LPDWORD);
 
 
 #ifdef __cplusplus