MDI adding childform from different project?

I have 3 projects created by someone else.

So.. 开发者_开发问答all three of them has form1.

I want to create a new window form like MDI and place them as a child.

I can't add them as the namespaces are different. Is it possible to add like this?

Coz.. the example shown is.. add new form under the current project.

I don't see why this wouldn't work.

-Make sure that the IsMdiContainer property of your new Form is set to true

-Add references to the other projects

-Add this code in your new windows form (the MDI parent) (assuming WindowsFormsApplication2 is the name of one of the projects):

//Create a new instance of the MDI child form 
WindowsFormsApplication2.Form1 childForm = new WindowsFormsApplication2.Form1(); 

//Set parent form for the child window 
childForm .MdiParent=this;

//Display the child window
childForm .Show();

Repeat for your other projects.