I have 3 dialogs on a Screen. The order is like this. First I have created a Modal Dialog. Over the Modal Dialog I have created a Modeless Dialog. And on a Button click event on the modeless dialog I have created one more Modal Dialog. The problem is When the mouse is clicked on the modeless dialog the control is within the 3rd dialog whereas when the mouse is clicked on the first created modal dialog the control is lost and it gives some assertion errors. The assertion errors are due to non destruction of the later dialogs. Please clear my doubt how to retain the control over the 3rd dialog even when the mouse is clicked on the first created dialog.