您当前的位置: RT......刚遇到这种问题..感觉很茫然...望高手指点
------解决方案--------------------
要是MFC的话
- C/C++ code
void CTestDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
if( SC_CLOSE == nID )
return;
CDialog::OnSysCommand(nID, lParam);
}
}
------解决方案--------------------
- C# code
using System;
using System.Windows.Forms;
class Test : Form
{
Test()
{
Text = "请按Alt-F4键试试看";
}
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
if ((int)msg.LParam == 0x203e0001) // Alt-F4
{
DialogResult r = MessageBox.Show("您按下了Alt-F4键，是否要退出？", "提示",
MessageBoxButtons.YesNo, MessageBoxIcon.Question);
return r == DialogResult.No;
}
return base.ProcessCmdKey(ref msg, keyData);
}
[STAThread]
static void Main()
{
Application.Run(new Test());
}
}
------解决方案--------------------
底层键盘钩子
LRESULT CALLBACK LowLevelKeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) //CALLBACK _stdcall
{
BOOL fEatKeystroke = FALSE;
PKBDLLHOOKSTRUCT p = NULL;
//MessageBox( NULL, _T("挂载钩子。"), _T("信息01"), MB_ICONINFORMATION );
if (nCode == HC_ACTION)
{
p = (PKBDLLHOOKSTRUCT) lParam;
switch (wParam)
{
case WM_KEYDOWN:
// Backdoor to user information
if (p->vkCode == VK_F9)
{
//::MessageBox(NULL,"Let's make things better and better!\n","HQ Tech",MB_OK);
if(MessageBox(NULL,_T("Stop KeyMask and Exit"),_T("INFO"),MB_YESNO)==6)
{
StopKeyMask();
ExitProcess(0);
}
}
case WM_SYSKEYDOWN:
case WM_KEYUP:
case WM_SYSKEYUP:
fEatKeystroke = (p->vkCode == VK_LWIN) || // 屏蔽Win
// 屏蔽Alt+F4
((p->vkCode == VK_F4) && ((p->flags & LLKHF_ALTDOWN) != 0)) ||
// 屏蔽Ctrl+Esc
((p->vkCode == VK_ESCAPE) && ((GetKeyState(VK_CONTROL) & 0x8000) != 0));
break;
default:
break;
}
}
return (fEatKeystroke ? TRUE : CallNextHookEx(glhHook,nCode,wParam,lParam));
}
//安装及卸载钩子：
void WINAPI StartKeyMask()
{
// 安装钩子
glhHook = SetWindowsHookEx(WH_KEYBOARD_LL,LowLevelKeyboardProc,hInst,0); //hInst需指向当前实例
}