# 4189 Saving a Unit with Implementation Errors Can Cause Event Assignments to Be Cleared for a Form

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1) New visual project/form, placed few controls like panel,label, button, checkbox, image and changed forms' background to contain a image.

2) Created a second form, containing only one panel, did change onlick event on button (form1) to display form2 eg. form2.showmodal;

While I was "playing" with the ide interface, I forgot to insert uses unit2, which resulted in compiler error. After fixing the error in code the form2 did not show when running from ide, this is where I found out that onclick event was not listed on button property.