Attach a child control on a Custom Control

Question

Hi I am programming a custom control behaving almost as a GroupBox control. At design time when I drop another control (say a CheckBox)on this GroupBox it does not seem to be attached to it. I know I have to call the GroupBox.Controls.Add method but I do not know where to do that. Using the DragDrop event of the GroupBox I am not able to find any references of the being created CheckBox in fact I think that it does not even exist. So what is the solution? Many thanks Christophe.

Mike Gold · Answer

This is probably more complicated than you think. You'll need to affect the Visual Studio designer itself in order to make this happen. This will involve the System.Drawing.Design namespace ITypeDescriptor and possibly the System.Windows.Forms namespace. You'll need to create classes from these namespaces and override behavior in these classes. Mike G.