发送按键的问题

[a78205917]

如何向一个不是当前窗口的窗体发送按键啊，比如发送个alt+a过去，如何实现啊，研究了好久都以失败告终，有没有高手能帮帮小弟的。

[黄舒颖 咸丫蛋]

能取名叫Python。膜拜啊
[Quote=引用 2 楼 python 的回复:]
如果向非当前窗体发送，则需要先找到目标窗体的句柄，然后发送对应的消息即可
[/Quote]

[事理]

不好意思，SendKeys.Send("%A");//发送ALT+A
A应该是小写，大写不行，写错了。

[yingzhilian2008]

键盘钩子 ！！！

[Python]

// 声明部分
[StructLayout(LayoutKind.Sequential)]
internal struct MOUSEINPUT
{
	public int dx;
	public int dy;
	public int mouseData;
	public int dwFlags;
	public int time;
	public IntPtr dwExtraInfo;
}

[StructLayout(LayoutKind.Sequential)]
internal struct KEYBDINPUT
{
	public short wVk;
	public short wScan;
	public int dwFlags;
	public int time;
	public IntPtr dwExtraInfo;
}

[StructLayout(LayoutKind.Sequential)]
internal struct HARDWAREINPUT
{
	public int uMsg;
	public short wParamL;
	public short wParamH;
}

[StructLayout(LayoutKind.Explicit)]
internal struct Input
{
	[FieldOffset(0)]
	public int type;                  // Mouse: 0; Keyboard: 1; hardware: 2
	[FieldOffset(4)]
	public MOUSEINPUT mi;
	[FieldOffset(4)]
	public KEYBDINPUT ki;
	[FieldOffset(4)]
	public HARDWAREINPUT hi;
}

[DllImport("user32.dll")]
private static extern uint SendInput(uint nInputs, Input[] pInputs, int cbSize);




//使用部分
Input[] input = new Input[T_CartonID.Text.Length * 2 + 4];
int i = 0;

foreach (char nChar in MyText)
{
	input[i].type = 1;
	input[i].ki.wVk = Convert.ToInt16(nChar);

	i++;

	input[i].type = 1;
	input[i].ki.wVk = Convert.ToInt16(nChar);
	input[i].ki.dwFlags = 2;

	i++;
}

// Enter key
input[input.Length - 4].type = 1;
input[input.Length - 4].ki.wVk = 0x0D;
input[input.Length - 3].type = 1;
input[input.Length - 3].ki.wVk = 0x0D;
input[input.Length - 3].ki.dwFlags = 2;

input[input.Length - 2].type = 1;
input[input.Length - 2].ki.wVk = 0x0A;
input[input.Length - 1].type = 1;
input[input.Length - 1].ki.wVk = 0x0A;
input[input.Length - 1].ki.dwFlags = 2;

SendInput((uint)input.Length, input, Marshal.SizeOf(input[0]));

[Python]

如果向非当前窗体发送，则需要先找到目标窗体的句柄，然后发送对应的消息即可

[事理]

可以用API的FindWindow 和 SetForegroundWindow来强制聚焦到其他应用程序上


private void Form1_Load(object sender, EventArgs e)
{
KeyboardHook keyboardHook = new KeyboardHook();//全局按键
keyboardHook.KeyDown += new KeyEventHandler(keyboardHook_KeyDown);
keyboardHook.Start();
}

void keyboardHook_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.F2)
{
SendKeys.Send("%A");//发送ALT+A
}
}