The AddExcludeHwnd method adds a window to the skinning exclusion list.  This must be done before the window is shown in order for the exclusion to take effect.

This method does not return a value.

Windows are hooked to be skinned after they are shown, so if the window has been shown before AddExcludeHwnd is called, the window cannot be excluded.

RemoveExcludeHwnd, SetIncludeorExcludeMode