Function winapi::um::uxtheme::GetThemeBackgroundRegion

pub unsafe extern "system" fn GetThemeBackgroundRegion(
    hTheme: HTHEME, 
    hdc: HDC, 
    iPartId: c_int, 
    iStateId: c_int, 
    pRect: LPCRECT, 
    pRegion: *mut HRGN
) -> HRESULT