解决Delphi MDI 闪烁问题（使用WM_SETREDRAW锁屏后进行处理）

procedure TMainForm.CreateMDIChild(const Name: string);
var
Child: TMDIChild;
begin
{ create a new MDI child window }
Perform(WM_SETREDRAW, , ); //锁屏幕
Child := TMDIChild.Create(Application);
Child.WindowState := wsMaximized; //假设在这里将新建的子窗体设为最大化
//或设置子窗体的Width和Height都可以
Child.Caption := Name;
if FileExists(Name) then Child.Memo1.Lines.LoadFromFile(Name);
Perform(WM_SETREDRAW, , ); //解锁屏幕并重画
RedrawWindow(Handle, Nil, , RDW_FRAME + RDW_INVALIDATE +
RDW_ALLCHILDREN + RDW_NOINTERNALPAINT);
end;

http://blog.csdn.net/shuaihj/article/details/6129278