我写了一个全局钩子。当按F12时,模拟键盘输入'w'。
部分代码如下:LRESULT CALLBACK KeyboardProc(
int code, // hook code
WPARAM wParam, // virtual-key code
LPARAM lParam // keystroke-message information
)
{
if(VK_F12==wParam)
{
keybd_event(0x57,0,0,0);
keybd_event(0x57,0,KEYEVENTF_KEYUP,0);
return 1;
}
else
{
return CallNextHookEx(g_hKeyboard,code,wParam,lParam);
}
}运行的时候,问题来了。我每按一次F12,会出现2个'w',为什么?怎么解决?
部分代码如下:LRESULT CALLBACK KeyboardProc(
int code, // hook code
WPARAM wParam, // virtual-key code
LPARAM lParam // keystroke-message information
)
{
if(VK_F12==wParam)
{
keybd_event(0x57,0,0,0);
keybd_event(0x57,0,KEYEVENTF_KEYUP,0);
return 1;
}
else
{
return CallNextHookEx(g_hKeyboard,code,wParam,lParam);
}
}运行的时候,问题来了。我每按一次F12,会出现2个'w',为什么?怎么解决?
if (pMsg->message == WM_KEYDOWN)
{
//...
}
else if (pMsg->message == WM_KEYUP)
{
//...
}
int code, // hook code
WPARAM wParam, // virtual-key code
LPARAM lParam // keystroke-message information
)
{
if((VK_F12==wParam) && (lParam & 0x80000000)==0))
{
keybd_event(0x57,0,0,0);
keybd_event(0x57,0,KEYEVENTF_KEYUP,0);
return 1;
}
else
{
return CallNextHookEx(g_hKeyboard,code,wParam,lParam);
}
}按2个w是应为 键盘DOWN会按一下 UP也会按一下 ,做个判断就行了
4楼你的方法可以,谢谢。
lParam & 0x80000000是UP 还是DOWN ?
UP和DOWN分别如何表示?
lParam & 0x40000000
一个UP 一个DOWN ,你测试下 按住那个键 有字出来的就是DWON,
#pragma data_seg(push, "Shared")
HHOOK NextHook = NULL;
#pragma data_seg(pop)
#pragma comment(linker, "/SECTION:Shared,RWS")HMODULE Module;BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
{
if (ul_reason_for_call == DLL_PROCESS_ATTACH)
Module = hModule;
return TRUE;
}LRESULT CALLBACK GetMsgProc(int code, WPARAM wParam, LPARAM lParam)
{
if (code == HC_ACTION)
{
PMSG msg = (PMSG)lParam;
if (msg->message == WM_KEYDOWN || msg->message == WM_KEYUP)
{
if (msg->wParam == VK_F12)
{
msg->wParam = 'W';
}
}
}
return CallNextHookEx(NextHook, code, wParam, lParam);
}__declspec(dllexport) void StartHook()
{
NextHook = SetWindowsHookEx(WH_GETMESSAGE, GetMsgProc, Module, 0);
}__declspec(dllexport) void StopHook()
{
UnhookWindowsHookEx(NextHook);
}