Locking the Form

Question

Hi.
I need your help please..
I developed a form in Visual C# with a button on it. When I click that button, a sub form appears. Now I want that without processing or filling this sub form, user couldn't access the main form, this main form must be locked or somewhat else... waiting for your reply...

Augustin Jianu · Answer

In the main form you should have: private void button1_Click(object sender EventArgs e) { SubForm sf = new SubForm(); sf.ShowDialog(); } In the SubForm on the FormClosing event you should have: private void SubForm_FormClosing(object sender FormClosingEventArgs e) { // if the user didn't fill all the data needed on the subForm you don't allow him to close the subForm if( ! isAllDataComplete() ) e.Cancel = true; }