如何在对话框程序上设置固定纸张？？？？

[keyou]

//获得行，列的个数
CHeaderCtrl* pHeader = m_histsoe.GetHeaderCtrl();
int nColCount = pHeader->GetItemCount();
int nLineCount = m_histsoe.GetItemCount();

if( nLineCount <= 0 )
{
MessageBox("没有可以打印的数据项!", "错误", MB_ICONEXCLAMATION);
return;
}

PRINTDLG pd;
pd.lStructSize = sizeof(PRINTDLG);
pd.Flags = PD_RETURNDC;
pd.hDC = NULL;
pd.hwndOwner = NULL;
pd.hInstance = NULL;
pd.nMaxPage = 1;
pd.nMinPage = 1;
pd.nFromPage = 1;
pd.nToPage = 1;
pd.nCopies = 1;
pd.hDevMode = NULL;
pd.hDevNames = NULL;

//显示打印对话框，由用户来设定纸张大小等。
if(!PrintDlg(&pd)) return;
if(pd.hDC==NULL)
{
MessageBox("打印机设置错误!", "严重错误", MB_ICONEXCLAMATION);
return;
}
//纸张尺寸
int nHorRes = GetDeviceCaps(pd.hDC, HORZRES);
int nVerRes = GetDeviceCaps(pd.hDC, VERTRES);

//页边空白
int nXMargin = 3;
int nYMargin = 3;
TEXTMETRIC tm;
//取得字体
GetTextMetrics(pd.hDC, &tm);
int nCharHeight = tm.tmHeight;
int nCharWidth = tm.tmAveCharWidth;

//第一列位置
int nColX =nXMargin*nCharWidth;

int nChar[5]={3,18,45,15,8};
int i;
DOCINFO di;
di.cbSize = sizeof(DOCINFO);
di.lpszDocName = "历史事项打印";
di.lpszOutput = (LPTSTR) NULL;
di.lpszDatatype = (LPTSTR) NULL;
di.fwType = 0;

CFont font, *pOldFont;
LOGFONT lf;
memset(&lf, 0, sizeof(LOGFONT));// zero out structure
lf.lfHeight = nCharHeight-12;// request a 12-pixel-height
strcpy(lf.lfFaceName, "宋体");// request a face name "Arial"
VERIFY(font.CreateFontIndirect(&lf));// create the font
CDC *pDc = CDC::FromHandle(pd.hDC);
pOldFont = pDc->SelectObject(&font);
int nMaxLinePerPage = nVerRes/nCharHeight -nYMargin-2;//每页行数
int nCurPage =1;
if( nLineCount > nMaxLinePerPage*5 )//当数据量过大时提示确认
{
int ret=IDOK;
if( ret == IDCANCEL )
{
DeleteDC(pd.hDC);
return;
}
}

StartDoc(pd.hDC, &di);
StartPage(pd.hDC);
//////////////////////////////////////////////////////

如何在上面程序设置固定纸张，如A3纸！！？

[sans]

LONG lSize;
CPrintDialog * ppd = new CPrintDialog(FALSE);
ppd->GetDefaults();
strncpy(m_szPrinterName,ppd->GetDeviceName(),100);
strncpy(m_szDriverName,ppd->GetDriverName(),100);
delete ppd;

memset(&m_lpDocInfo, 0, sizeof(DOCINFO));
m_lpDocInfo.cbSize = sizeof(DOCINFO);
m_lpDocInfo.lpszDocName = "SANS";
m_lpDocInfo.lpszOutput = NULL;
if(!OpenPrinter(m_szPrinterName, &m_hPrn,NULL)) return FALSE;
lSize = DocumentProperties(NULL,m_hPrn,m_szPrinterName,NULL,NULL,0);
if(lSize<0)
{
ClosePrinter(m_hPrn);
return FALSE;
}
m_pDM = (DEVMODE *)malloc(lSize);
if(m_pDM==NULL) return FALSE;
if(DocumentProperties(NULL,m_hPrn,m_szPrinterName,m_pDM,m_pDM,DM_OUT_BUFFER)<0)
{
ClosePrinter(m_hPrn);
free(m_pDM);
return FALSE;
}

//在这里设定纸张
m_pDM->dmPaperSize = iPaperSize;
m_pDM->dmPaperLength = iTableLength;
m_pDM->dmPaperWidth = iTableWidth;
m_pDM->dmFields |= DM_PAPERSIZE|DM_PAPERLENGTH|DM_PAPERWIDTH;
if(DocumentProperties(NULL,m_hPrn,m_szPrinterName,m_pDM,m_pDM,DM_IN_BUFFER|DM_OUT_BUFFER)<0)
{
free(m_pDM);
ClosePrinter(m_hPrn);
return FALSE;
}
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