GDI resource leak caused by VpeSetupPrinter

[czhu]

Hello,

We are using VPE 3.50. The VpeSetupPrinter method call is causing GDI leak. Is this a bug in VPE?

When the following code is executed in an application, the gdi objects count
in the window task manager will increase 4 every time. However, if the
EnableWindow(FALSE) is commented out, no gdi leak is reported.

Code: Select all

// Disable the application window as suggested by FQA.
CWnd* pWnd = AfxGetApp()->GetMainWnd();
pWnd->EnableWindow(FALSE);

long hDoc = ::VpeOpenDoc(GetSafeHwnd(), "",
           VPE_NO_STATUSSEG + VPE_NO_RULERS);
::VpeLicense(hDoc, "VPE-XXXXX-XXXX", "XXXX-XXXX");
::VpeSetPrintOptions(hDoc, PRINT_ALL + PRINT_NO_AUTO_PAGE_DIMS);

CString str = _T("c:\\temp\\print.prs");
::VpeSetupPrinter(hDoc, str, PRINTDLG_ALWAYS);
::VpeCloseDoc(hDoc);
pWnd->EnableWindow();

Thanks,
czhu

[IDEAL Software Support]

We have tested your code and can not confirm the problem in general.

Our test results are as follows:

1. The problem is caused by printer drivers.

2. On our test machine no printer driver is causing GDI leaks.

3. We found printer drivers, which are causing Windows handle leaks. Disabling the parent window has no effect on those leaks, they do occur always.

4. This is limited to some drivers, but not all printer drivers have this problem in general. The drivers causing handle leaks have a bug. It is really interesting, how many faulty printer drivers are shipped by their manufacturers, even from companies from which you wouldn't expect it.

Solution:
Try to obtain a newer version of your printer driver, or try to use a different compatible driver.

Regards
Thorsten Radde
IDEAL Software GmbH