C# 运用钩子做虚拟键盘程序，程序崩溃，提示：向非托管代码传递委托时，托管应用程序必须让这些委托保持活动状态，直到确信不会再次调用它们。
我引用的DLL是网上找的一个，叫CnBlogs.Youzai.HookEx.dll提示出错的地方是：
private IntPtr MouseHookProc(int nCode, IntPtr wParam, IntPtr lParam) {
// if ok and someone listens to our events
EventHandler<MouseExEventArgs> handler = this.Events[EventMouseActivity] as EventHandler<MouseExEventArgs>;
if ((nCode >= 0) && (handler != null)) {
//Marshall the data from callback.
MouseLLHookStruct mouseHookStruct = (MouseLLHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseLLHookStruct));
//detect button clicked
MouseButtons button = MouseButtons.None;
short mouseDelta = 0;
switch ((int)wParam) {
case WM_LBUTTONDOWN:
// case WM_LBUTTONUP:
// case WM_LBUTTONDBLCLK:
button = MouseButtons.Left;
break;
case WM_RBUTTONDOWN:
// case WM_RBUTTONUP:
// case WM_RBUTTONDBLCLK:
button = MouseButtons.Right;
break;
case WM_MOUSEWHEEL:
// If the message is WM_MOUSEWHEEL, the high-order word of mouseData member is the wheel delta.
// One wheel click is defined as WHEEL_DELTA, which is 120.
// (value >> 16) & 0xffff; retrieves the high-order word from the given 32-bit value
mouseDelta = unchecked((short)((mouseHookStruct.mouseData >> 16) & 0xffff));
//TODO: X BUTTONS (I havent them so was unable to test)
//If the message is WM_XBUTTONDOWN, WM_XBUTTONUP, WM_XBUTTONDBLCLK, WM_NCXBUTTONDOWN, WM_NCXBUTTONUP,
//or WM_NCXBUTTONDBLCLK, the high-order word specifies which X button was pressed or released,
//and the low-order word is reserved. This value can be one or more of the following values.
//Otherwise, mouseData is not used.
break;
}
//double clicks
int clickCount = 0;
if (button != MouseButtons.None)
if ((int)wParam == WM_LBUTTONDBLCLK || (int)wParam == WM_RBUTTONDBLCLK)
clickCount = 2;
else
clickCount = 1;
//generate event
MouseExEventArgs e = new MouseExEventArgs(
button,
clickCount,
mouseHookStruct.pt.x,
mouseHookStruct.pt.y,
mouseDelta,
mouseHookStruct.flags
);
//raise it
handler(this, e);
}
//call next hook;
return CallNextHookEx(hMouseHook, nCode, wParam, lParam);
}
错误信息如下：
对“CnBlogs.Youzai.HookEx!CnBlogs.Youzai.HookEx.UserActivityHook+HookProc::Invoke”类型的已垃圾回收委托进行了回调。这可能会导致应用程序崩溃、损坏和数据丢失。向非托管代码传递委托时，托管应用程序必须让这些委托保持活动状态，直到确信不会再次调用它们。 虚拟键盘 钩子 委托 c# --------------------编程问答-------------------- 为什么要使用别人的dll啊
自己写个钩子啊
补充：.NET技术 , C#
