在sendmessage中如何把gettext的内容给一个字符串变量?

[yubintj]

up

[mxk19791116]

UP

[workhyj]

up

[chenhao1949]

e:arrar[0..30] of char;
sendmessage(hand,WM_gettext,30,integer(@e));

[bottom]

AnsiString GetText(HWND hWnd)
{
AnsiString Text;
if(hWnd)
{
char *buf;
int Length=(int)SendMessage(hWnd,WM_GETTEXTLENGTH ,0,0);
if(Length)
{
buf=new char[Length+2];
buf[Length]='\0';
buf[Length+1]='\0';
SendMessage(hWnd,WM_GETTEXT,Length+1,(LPARAM)buf);
Text=buf;
delete buf;
}
}
return Text;
}
//---------------------------------------------------------------------------

// 把数据写到控件
bool SetText(HWND hWnd,char *Text)
{
if(IsWindow(hWnd))
if(SendMessage(hWnd,WM_SETTEXT ,0,(LPARAM)Text))
return true;
return false;
}

[deanchang]

不懂为什么不用getwindowtext()