Hi, You can use the form property "Transparencykey". How to use? 1) Set the Transparencykey value to a color, for e.g. Red. 2) Add a panel control and set his color to Red. 3) Run the application. Note: All controls that will have the same color as you specify in the Transparencykey will be Transparent.

Hi, On the key press event write the following code: this.InvokeOnClick(button1, e);