Ok first start a new project in Visual Studio, name it whatever you like. Now you are going to change the setting IsMdiContainer to true. Spoiler Now, via a menu bar or however you want to do it, add a button. Spoiler Now add your mod tool as another form (I.E. Form2.vb) and put this code on the button. Spoiler Code: Form2.MdiParent = Me Form2.Show() Now when you start your program and press the button, your tool should pop up and not leave its parent. Spoiler You can also add a Close All button to close all open forms, use the following code for that. Code: For Each tool As Form In Me.MdiChildren tool.Close() Next