private int HookCallbackProc(int nCode, System.IntPtr wParam, System.IntPtr lParam)
{
if (nCode < 0)
{
return(ColorPicker_NativeMethods.CallNextHookEx(m_hHook, nCode, wParam, lParam));
}
else
{
//Marshall the data from the callback.
WinUtil.KeyboardHookStruct hookstruct =
(WinUtil.KeyboardHookStruct)System.Runtime.InteropServices.Marshal.PtrToStructure(lParam, typeof(WinUtil.KeyboardHookStruct));
if (OnKeyDown != null && wParam.ToInt32() == WinUtil.WM_KEYDOWN)
{
System.Windows.Forms.Keys key = (System.Windows.Forms.Keys)hookstruct.vkCode;
if ((System.Windows.Forms.Control.ModifierKeys & System.Windows.Forms.Keys.Shift) == System.Windows.Forms.Keys.Shift)
{
key |= System.Windows.Forms.Keys.Shift;
}
if ((System.Windows.Forms.Control.ModifierKeys & System.Windows.Forms.Keys.Control) == System.Windows.Forms.Keys.Control)
{
key |= System.Windows.Forms.Keys.Control;
}
var e = new System.Windows.Forms.KeyEventArgs(key);
e.Handled = false;
OnKeyDown(e);
if (e.Handled)
{
return(1);
}
}
int result = 0;
if (m_hHook != 0)
{
result = ColorPicker_NativeMethods.CallNextHookEx(m_hHook, nCode, wParam, lParam);
}
return(result);
}
}
public void SetHook(bool enable)
{
if (enable && m_hHook == 0)
{
m_HookCallback = new ColorPicker_NativeMethods.HookProc(HookCallbackProc);
System.Reflection.Module module = System.Reflection.Assembly.GetExecutingAssembly().GetModules()[0];
m_hHook = ColorPicker_NativeMethods.SetWindowsHookEx(WinUtil.WH_KEYBOARD_LL, m_HookCallback, System.Runtime.InteropServices.Marshal.GetHINSTANCE(module),
0);
if (m_hHook == 0)
{
System.Windows.Forms.MessageBox.Show(
"SetHook Failed. Please make sure the 'Visual Studio Host Process' on the debug setting page is disabled");
return;
}
return;
}
if (enable == false && m_hHook != 0)
{
ColorPicker_NativeMethods.UnhookWindowsHookEx(m_hHook);
m_hHook = 0;
}
}