static extern int GdipCreateBitmapFromGdiDib(IntPtr bminfo, IntPtr pixdat, ref IntPtr image);

Declare Function GdipCreateBitmapFromGdiDib Lib "GdiPlus.dll" (ByRef GdiBitmapInfo As BITMAPINFO, ByVal GdiBitmapData As Long, ByRef bitmap As Long) As Status

    int st = GdipCreateBitmapFromGdiDib(bminfo, pixdat, ref img);