Hi...
I hv created the MDI application in which parent form contians some ToolStrip buttons. I will call the child forms through menus. I have a problem in enabling the ToolStrip buttons in the parent form based on the button clicks of the child forms. On the button click of the menu item which displays the child form, i have written childForm.MdiParent = this(parent form). Can u help me in solving this issue?

Hi...

Button clicks on the child form cannot modify the state of the parent controls. This is because, the parent owns the child. The child form doesnt own the parent and so has no access rights.

But you can have a shared variable inside the same application name space and in the parent form check the value of the variable frequently ( and if the child modified it....) change the state of the toolstrip buttons