Function winapi::um::uxtheme::GetThemeBackgroundExtent

pub unsafe extern "system" fn GetThemeBackgroundExtent(
    hTheme: HTHEME, 
    hdc: HDC, 
    iPartId: c_int, 
    iStateId: c_int, 
    pContentRect: LPCRECT, 
    pExtentRect: LPRECT
) -> HRESULT