求助:dll调用约定错误
我运行,提示:实时错误49,dll调用约定错误,这是什么原因啊
vb:
声明:Public Declare Function togray Lib "togray" (ByVal hdc As Long, ByVal w As Long, ByVal h As Long)
调用:togray Picture1.hdc, picwidth, picheight
vc:
extern "C" void _stdcall togray(HDC hdc,int w,int h)