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C# 后台按键 视频播放器 全屏后无法 触发

IP云
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08/21
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第一种  (全屏不可触发) protected override bool ProcessCmdKey(ref System.Windows.Forms.Message msg, System.Windows.Forms.Keys keyData)
{
int WM_KEYDOWN = ;
int WM_SYSKEYDOWN = ;
if (msg.Msg == WM_KEYDOWN | msg.Msg == WM_SYSKEYDOWN)
{
switch (keyData)
{
case Keys.Escape:
DialogResult dr = MessageBox.Show("确定要退出吗?", "退出系统", MessageBoxButtons.OKCancel);
if (dr == DialogResult.OK)//如果点击“确定”按钮
{
FormPassword form = new FormPassword();
form.StartPosition = FormStartPosition.CenterScreen;
form.ShowDialog();
// this.Close();//esc关闭窗体 //System.Environment.Exit(0);
} break;
}
}
return false;
}

//第二种方法   (全屏可触发)

private void timer2_Tick(object sender, EventArgs e)
{
//因为回车的ASCII码是13 所以我们这里就用把回车的ascii传递过去
//需要监控什么按键就写某个按键的ASCII码
if (GetAsyncKeyState() != )
{
////MessageBox.Show("你按下了ESC");
DialogResult dr = MessageBox.Show("确定要退出吗?", "退出系统", MessageBoxButtons.OKCancel);
//if (dr == DialogResult.OK)//如果点击“确定”按钮
//{
// //Form2 form = new Form2();
// //form.StartPosition = FormStartPosition.CenterScreen;
// //form.ShowDialog();
// // this.Close();//esc关闭窗体 // System.Environment.Exit(0);
//} //this.Close();
}
}
[DllImport("user32")]
public static extern void mouse_event(int dwFlags, int dx, int dy, int dwData, int dwExtraInfo);
private readonly int MOUSEEVENTF_MOVE = 0x0001;//模拟鼠标左键按下
private readonly int MOUSEEVENTF_LEFTUP = 0x0004;//模拟鼠标左键抬起
[DllImport("user32.dll")]
//函数声明
public static extern int GetAsyncKeyState(int vKey);

//第三种方法 视频播放器按键事件 (全屏不可触发)

private void axWindowsMediaPlayer1_KeyDownEvent_1(object sender, _WMPOCXEvents_KeyDownEvent e)
{
if (e.nKeyCode == (int)Keys.Escape) //
{
//MessageBox.Show("test");
this.Close();
}
}

//第四种方法

HOOK,    只能触发几下 就失效了 不知道为啥 ,........

附：

VK_LBUTTON             鼠标左键                      0x01

VK_RBUTTON             鼠标右键                      0x02

VK_CANCEL              Ctrl + Break                  0x03

VK_MBUTTON             鼠标中键                      0x04

VK_BACK                Backspace 键       0x08

VK_TAB                 Tab 键                        0x09

VK_RETURN              回车键                        0x0D

VK_SHIFT               Shift 键                      0x10

VK_CONTROL             Ctrl 键                       0x11

VK_MENU                Alt 键                 0x12

VK_pause               Pause 键                      0x13

VK_CAPITAL             Caps Lock 键                  0x14

VK_ESCAPE              Esc 键                        0x1B

VK_SPACE               空格键         0x20

VK_PRIOR               Page Up 键                    0x21

VK_NEXT                Page Down 键                  0x22

VK_END                 End 键                        0x23

VK_HOME                Home 键                       0x24

VK_LEFT                左箭头键                      0x25

VK_UP                  上箭头键                      0x26

VK_RIGHT               右箭头键                      0x27

VK_DOWN                下箭头键                      0x28

VK_SNAPSHOT            print screen 键               0x2C

VK_Insert              Insert 键                     0x2D

VK_Delete              Delete 键                     0x2E

'0' – '9'             数字 0 - 9                    0x30 - 0x39

'A' – 'Z'             字母 A - Z                    0x41 - 0x5A

VK_LWIN                左WinKey(104键盘才有)         0x5B

VK_RWIN                右WinKey(104键盘才有)         0x5C

VK_APPS                AppsKey(104键盘才有)          0x5D

VK_NUMPAD0            小键盘 0 键                    0x60

VK_NUMPAD1            小键盘 1 键                    0x61

VK_NUMPAD2            小键盘 2 键                    0x62

VK_NUMPAD3            小键盘 3 键                    0x63

VK_NUMPAD4            小键盘 4 键                    0x64

VK_NUMPAD5            小键盘 5 键                    0x65

VK_NUMPAD6            小键盘 6 键                    0x66

VK_NUMPAD7            小键盘 7 键                    0x67

VK_NUMPAD8            小键盘 8 键                    0x68

VK_NUMPAD9            小键盘 9 键                    0x69

VK_F1 - VK_F24        功能键F1 – F24               0x70 - 0x87

VK_NUMLOCK            Num Lock 键                   0x90

VK_SCROLL             Scroll Lock 键                0x91