我在WinCC 6.0下试验成功了,完整的代码行如下:

#include "apdefap.h"
void OnLButtonDown(char* lpszPictureName, char* lpszObjectName, char* lpszPropertyName, UINT nFlags, int x, int y)
{
#pragma code("user32.dll")

BOOL CloseWindow(HWND hWnd);

#pragma code()

BOOL bRet = FALSE;

HWND handle;

handle=FindWindow(NULL,"WinCC-运行系统 - ");

bRet =CloseWindow(handle);
}