100分请高手帮看代码！！！

[bluearc888]

请教如何将以下的VB代码译成delphi代码：特别是第3行和第6行。
1) Dim PassChar As Byte
2) Dim PassWord As String
3) PassWord = String(256, Chr(0))
4) PassChar = SendMessage(Ihwnd, EM_GETPASSWORDCHAR, 0, 0)
5) Call PostMessage(Ihwnd, EM_SETPASSWORDCHAR, 0, 0)
6) Call SendMessage(Ihwnd, WM_GETTEXT, 256, ByVal PassWord)
7) Call PostMessage(Ihwnd, EM_SETPASSWORDCHAR, PassChar, 0)
8) GetText = PassWord
为什么老是出错。。。
第6行的Byval是不是该参数按值传递的意思？在delphi中应如何表示？？？
先谢了！！！

[hsmserver]

SendMessage(Ihwnd, WM_GETTEXT, 256, val PassWord)

[bluearc888]

多谢各位，我试试。。。
有个朋友说的放这里一下。SendMessage(aHwnd,WM_GETTEXT,256,integer(PassWord[0]))

[liufuyahong]

var
...
PassWord:array[0..255] of Char;
begin
FillChar(PassWord,256,#0);
...
SendMessage(接收对象.Handle,WM_GETTEXT,256,Integer(@PassWord));
...
end;

[zwb666]

var
...
PassWord:array[0..255] of Char;
begin
FillChar(PassWord,256,#0);
...
SendMessage(接收对象.Handle,WM_GETTEXT,256,Integer(@PassWord));
...
end;