tform1为mdichild tform2=class(tform1) ...... var form2:tform2; ..... 打开:if not assigned(form2) then form2:=tform2.create(application); form2.show; //execute only once,why? onclose:action:=cafree;
if (assigned(form2)=false) or (form2.ComponentCount=0) then form2:=tform2.create(application); form2.show;
tform2=class(tform1)
......
var
form2:tform2;
.....
打开:if not assigned(form2) then
form2:=tform2.create(application);
form2.show; //execute only once,why?
onclose:action:=cafree;
form2:=tform2.create(application);
form2.show;