wxBitmap *bitmap = (wxBitmap *)data;
HBITMAP hBitmap = (HBITMAP)bitmap->GetHBITMAP();
// NULL palette means to use the system one
wxBitmap *bitmap = (wxBitmap *)data;
HBITMAP hBitmap = (HBITMAP)bitmap->GetHBITMAP();
// NULL palette means to use the system one