private void cbtHook_Callback(int nCode, IntPtr wParam, IntPtr lParam, ref bool handled)
{
switch ((HCBT)nCode)
{
case HCBT.SetFocus:
// wParam
// Определяет дескриптор окна, получающего фокус клавиатуры.
// lParam
// Определяет дескриптор окна, теряющего фокус клавиатуры.
//e.HWndGaining = (IntPtr)wParam;
//e.HWndLosing = lParam;
if (SetFocusCallback != null)
{
SetFocusCallback.Invoke(wParam, lParam, ref handled);
}
break;
case HCBT.Activate:
// wParam
// Определяет дескриптор окна, которое будет активировано
// lParam
// Specifies a long pointer to a CBTACTIVATESTRUCT structure containing the handle
// to the active window and specifies whether the activation is changing because of a mouse click.
if (ActivateCallback != null)
{
CBTActivateStruct cbtActivateStruct =
(CBTActivateStruct)Marshal.PtrToStructure(lParam, typeof(CBTActivateStruct));
ActivateCallback.Invoke(wParam, cbtActivateStruct.fMouse, ref handled);
}
break;
case HCBT.SysCommand:
// wParam
// Определяет значение системной команды (SC_)
// lParam
// low-order = X
// high-order = Y | This parameter is –1 if the command is chosen using a system accelerator, or zero if using a mnemonic.
switch ((SysCommands)wParam)
{
case SysCommands.SC_TASKLIST:
//e.Location = new System.Drawing.Point((int)lParam & 0xFFFF, (int)lParam >> 16);
if (TaskListCallback != null)
{
TaskListCallback.Invoke((int)lParam, ref handled);
}
break;
}
break;
}
}
public static void SetFocus <TObject>(TObject objCtrl, Form winf) where TObject : System.Windows.Forms.Control
{
if (objCtrl.InvokeRequired)
{
SetFocusCallback d = new SetFocusCallback(SetFocus);
if (winf.IsDisposed)
{
return;
}
winf.Invoke(d, new object[] { objCtrl, winf });
}
else
{
objCtrl.Focus();
}
}
public static void SetFocus <TObject>(TObject objCtrl, Control winf) where TObject : Control
{
if (objCtrl.InvokeRequired)
{
SetFocusCallback method = new SetFocusCallback(CallCtrlWithThreadSafety.SetFocus <Control>);
try
{
objCtrl.Invoke(method, new object[] { objCtrl, winf });
}
catch
{
try
{
objCtrl.Focus();
}
catch { }
}
}
else
{
objCtrl.Focus();
}
}
