Accesing Control Properties on Another Form
 

I'm trying to enable a button on the main form, once the child form is closing. I'm using a MDI here, and I noticed that if I do this by a button click on the child form it works. But it aint happening if i use the FormClosing or FormClosed events.

Please Help

Private Sub frmSuppliers_FormClosing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles MyBase.FormClosing
Dim frmMain As New frmMain
frmMain.tsbSuppliers.Enabled = True
End Sub


Re: Accesing Control Properties on Another Form
 

Does an instance of the main form not already exist? is that not where the child forms are hosted?

Creating a new instance of the main form and setting the enabled state of the button of that instance will not have an effect on the form already shown.

Try looking into the forms 'Parent' property and take it from there.

Re: Accesing Control Properties on Another Form
 

your best bet here is probably to create a public property on the child form that is set according to user input into the child form. Then, after you close the child form, you can check this property from the main form.

Re: Accesing Control Properties on Another Form
 

How would it be best to declare, reference and use new variables for this task when it could be done with a simple cast?

Imagine...

Re: Accesing Control Properties on Another Form
 

I was suggesting that for encapsulation. Having the child form muck with the parent form's controls abrogates the parent form's responsibility to take care of its own controls. Having a mechanism (property or otherwise) as part of the child form's interface that allows the parent form to determine its state and act appropriately seems a better solution to me.

Re: Accesing Control Properties on Another Form
 

Should be something along the lines of:


Give that a try.
If it doesn't work there, try it in the child form's Disposing event.