diff --git a/dlls/comctl32/animate.c b/dlls/comctl32/animate.c
index 71f8b424358..ac6ddba0d35 100644
--- a/dlls/comctl32/animate.c
+++ b/dlls/comctl32/animate.c
@@ -950,7 +950,7 @@ void ANIMATE_Register(void)
 
     ZeroMemory(&wndClass, sizeof(WNDCLASSA));
     wndClass.style         = CS_GLOBALCLASS | CS_DBLCLKS;
-    wndClass.lpfnWndProc   = (WNDPROC)ANIMATE_WindowProc;
+    wndClass.lpfnWndProc   = ANIMATE_WindowProc;
     wndClass.cbClsExtra    = 0;
     wndClass.cbWndExtra    = sizeof(ANIMATE_INFO *);
     wndClass.hCursor       = LoadCursorA(0, (LPSTR)IDC_ARROW);
diff --git a/dlls/comctl32/comboex.c b/dlls/comctl32/comboex.c
index ddf206fe8ca..f560c156edf 100644
--- a/dlls/comctl32/comboex.c
+++ b/dlls/comctl32/comboex.c
@@ -2252,7 +2252,7 @@ void COMBOEX_Register (void)
 
     ZeroMemory (&wndClass, sizeof(WNDCLASSW));
     wndClass.style         = CS_GLOBALCLASS;
-    wndClass.lpfnWndProc   = (WNDPROC)COMBOEX_WindowProc;
+    wndClass.lpfnWndProc   = COMBOEX_WindowProc;
     wndClass.cbClsExtra    = 0;
     wndClass.cbWndExtra    = sizeof(COMBOEX_INFO *);
     wndClass.hCursor       = LoadCursorW (0, (LPWSTR)IDC_ARROW);
diff --git a/dlls/comctl32/datetime.c b/dlls/comctl32/datetime.c
index 3fa2557b1aa..c8a2ed2372d 100644
--- a/dlls/comctl32/datetime.c
+++ b/dlls/comctl32/datetime.c
@@ -1037,7 +1037,7 @@ DATETIME_Register (void)
 
     ZeroMemory (&wndClass, sizeof(WNDCLASSW));
     wndClass.style         = CS_GLOBALCLASS;
-    wndClass.lpfnWndProc   = (WNDPROC)DATETIME_WindowProc;
+    wndClass.lpfnWndProc   = DATETIME_WindowProc;
     wndClass.cbClsExtra    = 0;
     wndClass.cbWndExtra    = sizeof(DATETIME_INFO *);
     wndClass.hCursor       = LoadCursorW (0, (LPCWSTR)IDC_ARROW);
diff --git a/dlls/comctl32/flatsb.c b/dlls/comctl32/flatsb.c
index a7a1f0063f2..cd15e3e1e5a 100644
--- a/dlls/comctl32/flatsb.c
+++ b/dlls/comctl32/flatsb.c
@@ -274,7 +274,7 @@ FLATSB_Register (void)
 
     ZeroMemory (&wndClass, sizeof(WNDCLASSA));
     wndClass.style         = CS_GLOBALCLASS;
-    wndClass.lpfnWndProc   = (WNDPROC)FlatSB_WindowProc;
+    wndClass.lpfnWndProc   = FlatSB_WindowProc;
     wndClass.cbClsExtra    = 0;
     wndClass.cbWndExtra    = sizeof(FLATSB_INFO *);
     wndClass.hCursor       = LoadCursorA (0, (LPSTR)IDC_ARROW);
diff --git a/dlls/comctl32/header.c b/dlls/comctl32/header.c
index cb4ec0b9757..743725c7609 100644
--- a/dlls/comctl32/header.c
+++ b/dlls/comctl32/header.c
@@ -1842,7 +1842,7 @@ HEADER_Register (void)
 
     ZeroMemory (&wndClass, sizeof(WNDCLASSA));
     wndClass.style         = CS_GLOBALCLASS | CS_DBLCLKS;
-    wndClass.lpfnWndProc   = (WNDPROC)HEADER_WindowProc;
+    wndClass.lpfnWndProc   = HEADER_WindowProc;
     wndClass.cbClsExtra    = 0;
     wndClass.cbWndExtra    = sizeof(HEADER_INFO *);
     wndClass.hCursor       = LoadCursorA (0, (LPSTR)IDC_ARROW);
diff --git a/dlls/comctl32/listview.c b/dlls/comctl32/listview.c
index ca76edb373b..efaf321858a 100644
--- a/dlls/comctl32/listview.c
+++ b/dlls/comctl32/listview.c
@@ -9279,7 +9279,7 @@ void LISTVIEW_Register(void)
 
     ZeroMemory(&wndClass, sizeof(WNDCLASSW));
     wndClass.style = CS_GLOBALCLASS | CS_DBLCLKS;
-    wndClass.lpfnWndProc = (WNDPROC)LISTVIEW_WindowProc;
+    wndClass.lpfnWndProc = LISTVIEW_WindowProc;
     wndClass.cbClsExtra = 0;
     wndClass.cbWndExtra = sizeof(LISTVIEW_INFO *);
     wndClass.hCursor = LoadCursorW(0, (LPWSTR)IDC_ARROW);
diff --git a/dlls/comctl32/monthcal.c b/dlls/comctl32/monthcal.c
index 19a5d3147d3..09f294f1d42 100644
--- a/dlls/comctl32/monthcal.c
+++ b/dlls/comctl32/monthcal.c
@@ -2068,7 +2068,7 @@ MONTHCAL_Register(void)
 
   ZeroMemory(&wndClass, sizeof(WNDCLASSA));
   wndClass.style         = CS_GLOBALCLASS;
-  wndClass.lpfnWndProc   = (WNDPROC)MONTHCAL_WindowProc;
+  wndClass.lpfnWndProc   = MONTHCAL_WindowProc;
   wndClass.cbClsExtra    = 0;
   wndClass.cbWndExtra    = sizeof(MONTHCAL_INFO *);
   wndClass.hCursor       = LoadCursorA(0, (LPSTR)IDC_ARROW);
diff --git a/dlls/comctl32/nativefont.c b/dlls/comctl32/nativefont.c
index 72218815dc7..86d1e79fa96 100644
--- a/dlls/comctl32/nativefont.c
+++ b/dlls/comctl32/nativefont.c
@@ -117,7 +117,7 @@ NATIVEFONT_Register (void)
 
     ZeroMemory (&wndClass, sizeof(WNDCLASSW));
     wndClass.style         = CS_GLOBALCLASS;
-    wndClass.lpfnWndProc   = (WNDPROC)NATIVEFONT_WindowProc;
+    wndClass.lpfnWndProc   = NATIVEFONT_WindowProc;
     wndClass.cbClsExtra    = 0;
     wndClass.cbWndExtra    = sizeof(NATIVEFONT_INFO *);
     wndClass.hCursor       = LoadCursorW (0, (LPWSTR)IDC_ARROW);
diff --git a/dlls/comctl32/rebar.c b/dlls/comctl32/rebar.c
index 70cc30e4d41..6508b38fdc1 100644
--- a/dlls/comctl32/rebar.c
+++ b/dlls/comctl32/rebar.c
@@ -4710,7 +4710,7 @@ REBAR_Register (void)
 
     ZeroMemory (&wndClass, sizeof(WNDCLASSA));
     wndClass.style         = CS_GLOBALCLASS | CS_DBLCLKS;
-    wndClass.lpfnWndProc   = (WNDPROC)REBAR_WindowProc;
+    wndClass.lpfnWndProc   = REBAR_WindowProc;
     wndClass.cbClsExtra    = 0;
     wndClass.cbWndExtra    = sizeof(REBAR_INFO *);
     wndClass.hCursor       = 0;
diff --git a/dlls/comctl32/syslink.c b/dlls/comctl32/syslink.c
index d8e7a29ddd5..538ca0c26ab 100644
--- a/dlls/comctl32/syslink.c
+++ b/dlls/comctl32/syslink.c
@@ -1662,7 +1662,7 @@ VOID SYSLINK_Register (void)
 
     ZeroMemory (&wndClass, sizeof(wndClass));
     wndClass.style         = CS_GLOBALCLASS | CS_VREDRAW | CS_HREDRAW;
-    wndClass.lpfnWndProc   = (WNDPROC)SysLinkWindowProc;
+    wndClass.lpfnWndProc   = SysLinkWindowProc;
     wndClass.cbClsExtra    = 0;
     wndClass.cbWndExtra    = sizeof (SYSLINK_INFO *);
     wndClass.hCursor       = LoadCursorW (0, (LPWSTR)IDC_ARROW);
diff --git a/dlls/comctl32/treeview.c b/dlls/comctl32/treeview.c
index 37d100df9f9..cf09fb6f495 100644
--- a/dlls/comctl32/treeview.c
+++ b/dlls/comctl32/treeview.c
@@ -5399,7 +5399,7 @@ TREEVIEW_Register(void)
 
     ZeroMemory(&wndClass, sizeof(WNDCLASSA));
     wndClass.style = CS_GLOBALCLASS | CS_DBLCLKS;
-    wndClass.lpfnWndProc = (WNDPROC)TREEVIEW_WindowProc;
+    wndClass.lpfnWndProc = TREEVIEW_WindowProc;
     wndClass.cbClsExtra = 0;
     wndClass.cbWndExtra = sizeof(TREEVIEW_INFO *);