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woyaofafa
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我把主窗体form1设置成fsMDIform,在把子窗体form2设置成fsMDIChild,<br>然后调用: if not assigned(form2) then<br> form2:=Tform2.Create(application)<br> else<br> showwindow(form2.Handle,SW_SHOWMAXIMIZED);<br>可是我在编译的时候却报错:<br> Cannot Createform NO MDI forms are currently active<br>这是什么原因? 我该怎么样设置?