Setting printer orientation to landscape

I have an dialog-based application that creates a plot in a CFrameWnd object and a landscape orientation.  Most printers, however, are setup for portrait output by default.  My application can bring up the print dialog box, but unless the user manually changes the orientation to landscape, the plot doesn't display properly.  IF THE USER SELECTES LANDSCAPE THE PRINTOUT IS CORRECT.  I would like to set the orientation in the printer Properties dialog box to landscape automatically.

The CPrintDialog allows for various PD_xxx flags, but orientation is not one of them.  Orientation is buried in the DEVMODE structure which I cannot seem to "get to" until AFTER the dialog box returns.  I can then query dmOrientation, but setting it to 2 (landscape) has no effect on the printout.

Here is the portion of code that prints the plot:
void CXPlot::OnPlotFilePrint()  // CXPlot derived from CFrameWnd
// create a device context and a print dialog box, attach the two,
//  and pass the device context to the draw routine to "redraw" the plot
    CDC dc;                         // get a device context
    CPrintDialog dlg(FALSE);        // create a print dialog box
    if (dlg.DoModal() == IDOK)      // display the print dialog box
        dc.Attach(dlg.GetPrinterDC());  // attach the printer dc
        DOCINFO di;
        ::ZeroMemory(&di, sizeof(DOCINFO));
        di.cbSize = sizeof(DOCINFO);
        di.lpszDocName = "My Plot";
        this->DrawSetupPrint(&dc);      // setup scaling
        this->Draw(&dc);                // draw the plot on the printer

I have tried calling the following code from various points in the above:
void CMyApp::SetPrinterOrientation(UINT orientation)
    PRINTDLG dlg;           // get a PRINTDLG structure
    DEVMODE FAR *pDevMode;  // pointer to a DEVMODE structure
    dlg.lStructSize = (DWORD)sizeof(PRINTDLG);
    if (this->GetPrinterDeviceDefaults(&dlg))       // a CWinApp function
        if ((pDevMode = (DEVMODE FAR *)::GlobalLock(m_hDevMode)) != NULL)
            pDevMode->dmOrientation = orientation;

The displayed orientation is always Portrait.  There must be a way I can automatically set the orientation to Landscape, isn't there?


Bill Stevener
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Yes - my Program forces Landscape orientation with the following code...

void CMyWinApp::SetLandscape() {
      // Get default printer settings.
      CPrintDialog dlg(FALSE);
      if (GetPrinterDeviceDefaults(&dlg.m_pd)) {
            // Lock memory handle.
            LPDEVMODE pDevMode = (LPDEVMODE)::GlobalLock(m_hDevMode);
            // Change printer settings in here.
            if (pDevMode) pDevMode->dmOrientation = DMORIENT_LANDSCAPE;
            // Unlock memory handle.

eMail me for formatted code at


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BTW: do this at the start of (or before calling) your OnPlotFilePrint.  I call my routine in my InitInstance()

stevenerAuthor Commented:

Thanks for your response.

The routine you suggested, CMyWinApp::SetLandscape() is nearly identical to the routine I posted in my original question, CMyApp::SetPrinterOrientation(UINT orientation).  Unfortunately, neither work as desired.

As I step through each statement with the debugger, I can verify that I am getting a valid DEVMODE structure, and that dmorientation is being set to DMORIENT_LANDSCAPE (2), and that it retains the value for the life of the application (when I invoke OnPlotFilePrint several times in the same run of the application, dmorientation is 1 the 1st time, 2 each succeeding time).  When the print dialog box appears and I select the "Properties" button, the orientation is always displayed as "Portrait", regardless of the value for dmorientation in the DEVMODE structure.  If I bypass the "Properties" button and select OK, the printout is in portrait mode.  If I select Landscape from the Properties page, the printout is landscape.

Is there anything else I need to do after setting the orientation to Landscape?  SetPrinterDeviceDefaults()?

BTW, I have tried this when the plot window is created, even before anything is drawn into it, and at the beginning of my OnPlotFilePrint routine.

Bill Stevener
stevenerAuthor Commented:
Although he didn't solve the problem, he was quick and on the right track.  Someone from one of the newsgroups DID solve the problem by pointing out that in my OnPlotFilePrint code, I needed to add:
between setting the orientation and the call to DoModal().  Adding this line solved the problem.
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