user32: Return INT_PTR instead of LRESULT in dialog procedures.

dlls/user32/tests/dialog.c

@@ -488,7 +488,7 @@ static LRESULT CALLBACK main_window_procA (HWND hwnd, UINT uiMsg, WPARAM wParam,
     return DefWindowProcA (hwnd, uiMsg, wParam, lParam);
 }
 
-static LRESULT CALLBACK disabled_test_proc (HWND hwnd, UINT uiMsg,
+static INT_PTR CALLBACK disabled_test_proc (HWND hwnd, UINT uiMsg,
         WPARAM wParam, LPARAM lParam)
 {
     switch (uiMsg)

dlls/user32/tests/msg.c

@@ -10110,7 +10110,7 @@ static LRESULT WINAPI ParentMsgCheckProcA(HWND hwnd, UINT message, WPARAM wParam
     return message == WM_COMPAREITEM ? -1 : ret;
 }
 
-static INT_PTR CALLBACK StopQuitMsgCheckProcA(HWND hwnd, UINT message, WPARAM wp, LPARAM lp)
+static LRESULT CALLBACK StopQuitMsgCheckProcA(HWND hwnd, UINT message, WPARAM wp, LPARAM lp)
 {
     if (message == WM_CREATE)
         PostMessageA(hwnd, WM_CLOSE, 0, 0);
@@ -14381,7 +14381,7 @@ static void test_dialog_messages(void)
     cls.lpszClassName = "MyDialogClass";
     cls.hInstance = GetModuleHandleA(NULL);
     /* need a cast since a dlgproc is used as a wndproc */
-    cls.lpfnWndProc = test_dlg_proc;
+    cls.lpfnWndProc = (WNDPROC)test_dlg_proc;
     if (!RegisterClassA(&cls)) assert(0);
 
     SetFocus(0);
@@ -14534,7 +14534,7 @@ static void test_EndDialog(void)
     ok(GetClassInfoA(0, "#32770", &cls), "GetClassInfo failed\n");
     cls.lpszClassName = "MyDialogClass";
     cls.hInstance = GetModuleHandleA(NULL);
-    cls.lpfnWndProc = test_dlg_proc;
+    cls.lpfnWndProc = (WNDPROC)test_dlg_proc;
     if (!RegisterClassA(&cls)) assert(0);
 
     flush_sequence();

dlls/user32/winproc.c

@@ -1046,7 +1046,7 @@ INT_PTR WINPROC_CallDlgProcA( DLGPROC func, HWND hwnd, UINT msg, WPARAM wParam,
 
     if (!func) return 0;
 
-    if (!(proc = handle_to_proc( func )))
+    if (!(proc = handle_to_proc( (WNDPROC)func )))
         ret = call_dialog_proc( hwnd, msg, wParam, lParam, &result, func );
     else if (proc == WINPROC_PROC16)
     {
@@ -1071,7 +1071,7 @@ INT_PTR WINPROC_CallDlgProcW( DLGPROC func, HWND hwnd, UINT msg, WPARAM wParam,
 
     if (!func) return 0;
 
-    if (!(proc = handle_to_proc( func )))
+    if (!(proc = handle_to_proc( (WNDPROC)func )))
         ret = call_dialog_proc( hwnd, msg, wParam, lParam, &result, func );
     else if (proc == WINPROC_PROC16)
     {