C#钩子函数放在线程里钩不上的解决办法

C#钩子函数放在线程里钩不上的解决办法

C#钩子函数如果直接用按钮引用,则没有问题,如果把这个函数放到多线程里,就会发现钩子钩不上了,这个问题我搞了一个星期也没搞定,后来还是查资料的时候无意中看到类似的问题,试了一下,发现真的可以完美解决此问题,现在把解决方法记下!

解决方法:

只要在线程中加入下面这段代码就行了:

tagMSG Msgs;

while (GetMessage(out Msgs, IntPtr.Zero, 0, 0) > 0)

{

TranslateMessage(ref Msgs);

DispatchMessage(ref Msgs);

}

其中结构体和函数的定义如下:

[DllImport("user32", EntryPoint = "GetMessage")]

public static extern int GetMessage(

out tagMSG lpMsg,

IntPtr hwnd,

int wMsgFilterMin,

int wMsgFilterMax

);

[DllImport("user32", EntryPoint = "DispatchMessage")]

public static extern int DispatchMessage(

ref tagMSG lpMsg

);

[DllImport("user32", EntryPoint = "TranslateMessage")]

public static extern int TranslateMessage(

ref tagMSG lpMsg

);

[StructLayout(LayoutKind.Sequential)]

public class POINT

{

public int x;

public int y;

}

public struct tagMSG

{

public int hwnd;

public uint message;

public int wParam;

public long lParam;

public uint time;

public int pt;

}

举个例子吧,下面1钩子不成功,2,3钩子成功:

1.(多线程失败)

private void Form1_Load(object sender, EventArgs e)

{

Thread th = new Thread(new ThreadStart(temp));

th.IsBackground = true;

//th.SetApartmentState(ApartmentState.STA);

th.Start();

}

private void temp()

{

hookKeyBoard = new HookKeyBoard();

hookKeyBoard.HookKeyBoardHandler += HookKeyBoardHandler;

hookKeyBoard.SetHook();

CheckForIllegalCrossThreadCalls = false;

}

2.(不利用多线程成功)

private void Form1_Load(object sender, EventArgs e)

{

hookKeyBoard = new HookKeyBoard();

hookKeyBoard.HookKeyBoardHandler += HookKeyBoardHandler;

hookKeyBoard.SetHook();

CheckForIllegalCrossThreadCalls = false;

}

3. (多线程成功)

private void Form1_Load(object sender, EventArgs e)

{

Thread th = new Thread(new ThreadStart(temp));

th.IsBackground = true;

//th.SetApartmentState(ApartmentState.STA);

th.Start();

}

private void temp()

{

hookKeyBoard = new HookKeyBoard();

hookKeyBoard.HookKeyBoardHandler += HookKeyBoardHandler;

hookKeyBoard.SetHook();

CheckForIllegalCrossThreadCalls = false;

tagMSG Msgs;

while (GetMessage(out Msgs, IntPtr.Zero, 0, 0) > 0)

{

TranslateMessage(ref Msgs);

DispatchMessage(ref Msgs);

}

}

写得够明白了吧,呵呵!