关于DrawText的问题

Question

我想调用DrawText在一个canvas上输出文字,但发现DT_VCENTER或DT_BOTTOM无效,这是怎么回事,操作系统是win2000,代码如下:DrawText(Image1->Canvas->Handle,"test",4,Image1->ClientRect,DT_VCENTER)但是显示的文字出现在做上角,换成DT_BOTTOM也无效,请用过的哥们给看看,谢了

Answer 1

DT_VCENTER或DT_BOTTOM要和DT_SINGLELINE一起用才有效.
DrawText(Image1->Canvas->Handle,"test",4,Image1->ClientRect,DT_SINGLELINE or DT_VCENTER)

Answer 2

试了一下,不行,代码如下:#include <vcl.h>
#pragma hdrstop#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
}
//---------------------------------------------------------------------------void __fastcall TForm1::Button1Click(TObject *Sender)
{
DrawText(Image1->Canvas->Handle,"test",4,&(Image1->ClientRect),DT_VCENTER || DT_SINGLELINE);}
//---------------------------------------------------------------------------点完按钮后,"test"在Image1的顶端居中显示

Answer 3

在C里用“|”
在Delphi里用“or”而不是“||”