Handle the size of Tooltip in GDBG/CellTipText

[Administrator]

Hi Clay

I found a sample in the dotnet newsgroup that handles the size of the Tooltip window. Is there a way to get the instance of the tooltip in GDBG when you''re displaying the tooltip.
The sample gets the handle of the tooltip windows and sends a message.

object o = typeof(ToolTip).InvokeMember("Handle",BindingFlags.NonPublic|BindingFlags.Instance|BindingFlags.GetProperty,null,myTooltip,null); IntPtr hwnd = (IntPtr) o; SendMessage(hwnd,0x0418, 0, 300); }

Regards
Thomas

[Administrator]

If you are deriving the GridDataBoundGrid, you can override

protected override ToolTip CreateCellToolTip()
{
	ToolTip tip = base.CreateCellToolTip();
	return tip;
}

and get at the ToolTip. If you only need to set the size there, then that would be all you would need. If you want to set it dynamically as teh tool is displayed, you can save a reference to the tooltip in the override, an dthen use this reference in an OnActivateToolTip override or in the event.

[Administrator]

Hi Clay

Thanks for the code.

protected override ToolTip CreateCellToolTip()
{
ToolTip cellTip = base.CreateCellToolTip();

cellTip.SetToolTip( this, "T" );
cellTip.SetToolTip( this, string.Empty );

object handle = typeof(System.Windows.Forms.ToolTip).InvokeMember(
"Handle",BindingFlags.NonPublic|BindingFlags.Instance|BindingFlags.GetProperty,
null,cellTip,null);
if( handle != null )
{
IntPtr hwnd = (IntPtr)handle;
SendMessage(hwnd,0x0418, 0, 300);
}

return cellTip;
}

The tooltip have to be set to an dummy value, otherwise the handle of the tooltip window is null and this causes an exception.

Regards
Thomas