FormChild reference to FormChild in FormMDI

Question

Hi I have a ParentForm (FormMDI) and tow ChildForm : FormChild1 FormChild2 - Step1 : Open FormChild1 by Menu FormChild1 f = new FormChild1(); f.MDIParent=this; f.show(); - Step2 : On FormChild1 I have a button when clicked it can open FormChild2 but FormChild2 still inside FormMDI. Detail: In ParentForm: Memuitem_clicked(sendere) { FormChild1 f = new FormChild1(); f.MDIParent = this f.show(); } My first child (FormChild1) contain a button and event: button1_clicked(sendere) { FormChild2 f = new formChild(); f.MDIParent = ???// I want FormChild2 opened from here and it inside FormParent f.show(); } In VB.NetI see can do this hoangsamac

Brandon Lewis · Answer

I believe your creating your FormChild2 object reference wrong. It should be: button1_Clicked(Object sender EventArgs e) { FormChild2 f = new FormChild2(); //Creates a reference to FormChild2 f.MDIParent = this.MDIParent; //Assigns the parent of f as the same parent of FormChild1 f.Show(); //Shows the new form in the parent MDIContainer } That should work if it doesnt... at least I hope you get the concept :) Good luck!