public override bool PreProcessMessage(ref Message message)
{
if (this.IsUserMode)
{
if (this.GetActiveXHostState(ActiveXHelper.SiteProcessedInputKey))
{
return(base.PreProcessMessage(ref message));
}
NativeMethods.MSG msg = (NativeMethods.MSG)message;
this.SetActiveXHostState(ActiveXHelper.SiteProcessedInputKey, false);
try
{
if (this.activeXOleInPlaceObject != null)
{
NativeMethods.HRESULT accelatorTranslated = this.activexOleInPlaceActiveObject.TranslateAccelerator(ref msg);
if (accelatorTranslated == NativeMethods.HRESULT.S_OK)
{
return(true);
}
message.Msg = msg.message;
message.WParam = msg.wParam;
message.LParam = msg.lParam;
message.HWnd = msg.hwnd;
if (accelatorTranslated == NativeMethods.HRESULT.S_FALSE)
{
return(base.PreProcessMessage(ref message));
}
if (this.GetActiveXHostState(ActiveXHelper.SiteProcessedInputKey))
{
return(base.PreProcessMessage(ref message));
}
return(false);
}
}
finally
{
this.SetActiveXHostState(ActiveXHelper.SiteProcessedInputKey, false);
}
}
return(false);
}
protected override bool ProcessMnemonic(char charCode)
{
if (base.CanSelect)
{
try
{
NativeMethods.tagCONTROLINFO controlInfo = new NativeMethods.tagCONTROLINFO();
if (NativeMethods.Succeeded(this.activeXOleControl.GetControlInfo(controlInfo)))
{
NativeMethods.MSG msg = new NativeMethods.MSG();
msg.hwnd = IntPtr.Zero;
msg.message = 260;
msg.wParam = (IntPtr)char.ToUpper(charCode, CultureInfo.CurrentCulture);
msg.lParam = (IntPtr)0x20180001;
msg.time = SafeNativeMethods.GetTickCount();
NativeMethods.POINT cursorPos = new NativeMethods.POINT();
UnsafeNativeMethods.GetCursorPos(cursorPos);
msg.pt = new NativeMethods._POINTL();
msg.pt.x = cursorPos.x;
msg.pt.y = cursorPos.y;
if (!SafeNativeMethods.IsAccelerator(new HandleRef(controlInfo, controlInfo.hAccel), controlInfo.cAccel, ref msg, null))
{
return(false);
}
this.activeXOleControl.OnMnemonic(ref msg);
this.Focus();
return(true);
}
}
catch (Exception ex)
{
if (Utils.IsCriticalException(ex))
{
throw;
}
}
}
return(false);
}
/// <summary>
/// Instructs the container to process a specified keystroke.
/// </summary>
/// <param name="pMsg">Pointer to the <see cref="NativeMethods.MSG"/> structure describing the keystroke to be processed.</param>
/// <param name="grfModifiers">Flags describing the state of the Control, Alt, and Shift keys. The value of the flag can be any valid <see cref="NativeMethods.tagKEYMODIFIERS"/> enumeration values.</param>
/// <returns>
/// <see langword="false"/> if the container processed the message; otherwise <see langword="true"/>.
/// </returns>
NativeMethods.HRESULT UnsafeNativeMethods.IOleControlSite.TranslateAccelerator(ref NativeMethods.MSG pMsg, NativeMethods.tagKEYMODIFIERS grfModifiers)
{
try
{
this.Host.SetActiveXHostState(ActiveXHelper.SiteProcessedInputKey, true);
Message message = (Message)pMsg;
return((this.Host.PreProcessControlMessage(ref message) == PreProcessControlState.MessageProcessed) ? NativeMethods.HRESULT.S_OK : NativeMethods.HRESULT.S_FALSE);
}
finally
{
this.Host.SetActiveXHostState(ActiveXHelper.SiteProcessedInputKey, false);
}
}
public static extern bool IsAccelerator(HandleRef hAccel, int cAccelEntries, [In] ref NativeMethods.MSG lpMsg, short[] lpwCmd);
NativeMethods.HRESULT UnsafeNativeMethods.IOleInPlaceFrame.TranslateAccelerator(ref NativeMethods.MSG lpmsg, short wID)
{
return(NativeMethods.HRESULT.S_FALSE);
}
