Hello Daniel,
Please refer to the following code snippet in order to avoid that gray rectangle behind the custom shape of the screen tip:
public RadForm1()
{
InitializeComponent();
this.radButton1.ScreenTipNeeded += this.NewRadButton1_ScreenTipNeeded;
}
private void NewRadButton1_ScreenTipNeeded(object sender, Telerik.WinControls.ScreenTipNeededEventArgs e)
{
PropertyInfo barProperty = ((ComponentBehavior)this.radButton1.Behavior).GetType().GetProperty("ScreenPresenter",
BindingFlags.NonPublic | BindingFlags.Instance);
Form screenTipForm = barProperty.GetValue(((ComponentBehavior)this.radButton1.Behavior), null) as Form;
screenTipForm.BackColor = this.BackColor;
screenTipForm.TransparencyKey = this.BackColor;
IntPtr hWnd = screenTipForm.Handle;
int GCL_STYLE = -26;
int ClassLong = NativeMethods.GetClassLongPtr(new HandleRef(null, hWnd), GCL_STYLE).ToInt32();
if ((ClassLong & NativeMethods.CS_DROPSHADOW) != 0)
{
ClassLong ^= NativeMethods.CS_DROPSHADOW;
NativeMethods.SetClassLong(new HandleRef(null, hWnd), GCL_STYLE, (IntPtr)ClassLong);
}
}I hope this helps. Do not hesitate to contact us if you have other questions.
Regards,
Nadya
Progress Telerik
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