new Gdiplus::Bitmap return NULL

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GDI+

new Gdiplus::Bitmap return NULL，detail is as follows（from stackoverflow）：

I was using the GDI object in DLL,new gdiplus::bitmap in DLL returned null,but new other object succeeded. I used GdiplusStartup(&gdiplusToken, gdiplusStartupInput, NULL) to initialize.
The code is like:

GdiplusStartup(&gdiplusToken, gdiplusStartupInput, NULL);
 ... 
Gdiplus::Bitmap *bmp = new Gdiplus::Bitmap(bmp_info.bmWidth, bmp_info.bmHeight, PixelFormat32bppARGB);

is there any GDI initialization work or initialzation work missed or other question.
HELP me!!!!!!!!!!!!!