在win98下这段代码失效？(100)(100分)

我在用下面的这段代码时，有个问题，这段代码在win2000下能很好的
进行打印纸张的设置，可是在wi98下面却发现这段代码部起作用？
Why?
来自：tax 时间：99-11-21 14:30:40 ID:158164
在打印前调用以下函数
procedure SetPaperSize(X, Y: Integer);
// 这段代码绝对可用。单位是0.1mm
// A4时 Printer.Pagewidth:=1440； A5时 Printer.Pagewidth:=1049；
// B5时 Printer.Pagewidth:=1290； 16K时 Printer.Pagewidth:=1035；
// lq1600宽行打印机这个值宽度最大为42cm左右, 长度大约2m。
{Question:
How can I change the papersize of my print job?
Answer:
One way to change printer settings at the start
of a print job is to change the printer's devicemode
structure.
See: TDEVMODE in the Delphi 1.02 help file or DEVMODE
in the Delphi 2.01 help file for other settings you can
change (providing the print driver supports the change).
The following example, contains code to change the papersize and
the paper bin that is uses:}
var
Device: array[0..255] of char;
Driver: array[0..255] of char;
Port: array[0..255] of char;
hDMode: THandle;
PDMode: PDEVMODE;
begin
Printer.PrinterIndex := Printer.PrinterIndex;
Printer.GetPrinter(Device, Driver, Port, hDMode);
if hDMode <> 0 then
begin
pDMode := GlobalLock(hDMode);
if pDMode <> nil then
begin
if (x = 0) or (y = 0) then
begin
{Set to legal}
pDMode^.dmFields := pDMode^.dmFields or dm_PaperSize;
{pDMode^.dmPaperSize := DMPAPER_LEGAL;
changed by wulianmin}
pDMode^.dmPaperSize := DMPAPER_FANFOLD_US;
end
else
begin
{Set to custom size}
pDMode^.dmFields := pDMode^.dmFields or
DM_PAPERSIZE or
DM_PAPERWIDTH or
DM_PAPERLENGTH;
pDMode^.dmPaperSize := DMPAPER_USER;
pDMode^.dmPaperWidth := x {SomeValueInTenthsOfAMillimeter};
pDMode^.dmPaperLength := y {SomeValueInTenthsOfAMillimeter};
end;
{Set the bin to use}
pDMode^.dmFields := pDMode^.dmFields or DMBIN_MANUAL;
pDMode^.dmDefaultSource := DMBIN_MANUAL;
GlobalUnlock(hDMode);
end;
end;
Printer.PrinterIndex := Printer.PrinterIndex;
//以下开始打印
end;

xac:如果你还要继续讨论请定期提前你的帖子，如果不想继续讨论请结束帖子。

看看api帮助里关于printdlg的数据结构说明。

参看机械出版社delphi开发指南。

时间太久，强制结束。
wjiachun的分太多，就不给你了