open MDIChild

[roitha]

Hello everybody. how do I open MDIChild Form from MDIChild Form? (VB.Net)

[minhnguyen08]

public formMain class .... dim frm as childform frm.mdiparent=me frm.show() ..... end class :-D

[meconomou]

You can't make a form child of another child. you have to set the parent property to the main form. A form can't be parent and child together. You get the following error An unhandled exception of type 'System.ArgumentException' occurred in system.windows.forms.dll Additional information: A form cannot be both an MDI child and MDI parent so the parent must be the main form not the the child.