哪位高手解决了小弟我就把100分全给哪位高手（很简单的keybd_event函数新手有关问题）

谁解决了我就把100分全给谁（很简单的keybd_event函数新手问题）
#include<windows.h>
void main()
{
  while(1)
 {
  keybd_event(VK_CONTROL,0,0,0);  
  keybd_event(79,0,0,0);  
  keybd_event(79,0, KEYEVENTF_EXTENDEDKEY|KEYEVENTF_KEYUP,0);  
  keybd_event(VK_CONTROL,0, KEYEVENTF_EXTENDEDKEY|KEYEVENTF_KEYUP,0);  
  Sleep(2000);
  }
}

  程序代码如上所示，要实现的就是按下组合键CTRL+O,O的虚拟码为79.程序一运行也会出现：“打开”对话框。可是遇到一个很奇怪的问题：每次一线束程序的运行，CTRL键仍处下按下状态，这是为什么呢？我不是有了“ keybd_event(VK_CONTROL,0, KEYEVENTF_EXTENDEDKEY|KEYEVENTF_KEYUP,0); ”这句弹起了吗？
  在线等，求真相。


[解决办法]

C/C++ code

keybd_event(VK_CONTROL, (BYTE)0, 0 ,0);keybd_event(79,(BYTE)0, 0 ,0); keybd_event(79, (BYTE)0, KEYEVENTF_KEYUP,0);keybd_event(VK_CONTROL, (BYTE)0, KEYEVENTF_KEYUP,0);
[解决办法]
keybd_event(VK_CONTROL, (BYTE)0, 0 ,0);
keybd_event(79,(BYTE)0, 0 ,0);  
keybd_event(79, (BYTE)0, KEYEVENTF_KEYUP,0);
keybd_event(VK_CONTROL, (BYTE)0, KEYEVENTF_KEYUP,0);
UP
[解决办法]
C/C++ code
KEYEVENTF_KEYUPIf specified, the key is being released. If not specified, the key is being depressed.
[解决办法]
探讨

我终于看到这只兔子回答问题了

[解决办法]
C/C++ code
keybd_event(VK_CONTROL, 0, KEYEVENTF_EXTENDEDKEY | 0 , 0);    keybd_event(_T('O'), 0, KEYEVENTF_EXTENDEDKEY | 0, 0);    keybd_event(_T('O'), 0, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);    keybd_event(VK_CONTROL, 0, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP , 0);