Declare various WXH* handles compatibly with SDK.

It is no longer necessary to cast between e.g. HINSTANCE and
WXHINSTANCE, they are now declared as the same type (without including
Windows SDK header).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64138 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/dlmsw.cpp

@@ -296,7 +296,7 @@ wxDynamicLibraryDetailsArray wxDynamicLibrary::ListLoaded()
 }
 
 /* static */
-HMODULE wxDynamicLibrary::MSWGetModuleHandle(const char *name, void *addr)
+WXHINSTANCE wxDynamicLibrary::MSWGetModuleHandle(const char *name, void *addr)
 {
     // we want to use GetModuleHandleEx() instead of usual GetModuleHandle()
     // because the former works correctly for comctl32.dll while the latter