关于自绘tree，有什么办法避免闪烁的问题啊
;  .if uMsg==WM_ERASEBKGND  ；
;          
;             mov eax,TRUE
;          ret
;                
    .if uMsg==WM_PAINT
                  
       
               invoke CallWindowProc, oldtreeproc,hwnd,uMsg,wParam,lParam
           
                invoke drawtree,hwnd,uMsg,@hdc,lParam
                 ret
用了双缓冲也不行，还是闪得历害

    ;invoke GetClipBox,newdc,addr @rect2
               ;  invoke GetClientRect,hwnd,addr @rect2
;                 
;                 invoke CreateRectRgnIndirect,addr @rect2
;                 mov @hrgn,eax
;                 invoke SelectClipRgn,newdc,addr @hrgn
;                               invoke DeleteObject,@hrgn
                       
                    
;                        invoke CreateCompatibleDC,newdc
;                        mov @hdc,eax
;                        invoke CreateCompatibleBitmap,newdc,@rect2.right,@rect2.     bottom
;                        mov @bitmap,eax
;                  invoke SelectObject,@hdc,@bitmap

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