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Multiple Document Interface (MDI)

MDI-Multiple Document Interface
Has a single parent form containing one or more inner forms

Example:

• Start a new project
• Change form property isMidContainer to true

This lets you have child windows within it

• Drop a button on the form (normally you use a menu)
• Change the text to Add Form
• right-click on the project in solution explorer and add a new form
• Call it child.vb
• Go back to MDI form
• Double click button

Dim frmChild as new child()
frmChild.mdiparent=me
frmchild.show()

• run it

 

the form is inside the parent form
you can drag it around but only inside the parent window

forms have a layoutMDI method that takes an enum
an enum is basically a list of possibilities

1. mdilayout.arrangeicons
2. mdilayout.cascade
3. mdilayout.tilehorizontal
4. mdilayout.tilevertical

• add two buttons
• name them btncascade and btntile
• change the text to Cascade and Tile

• add this to btncascade

me.layoutmdi(mdilayout.cascade)

• add this to the btntile

me.layoutmdi(mdilayout.tilehorizontal)