Calling sysdm.cpl from MFC....

From:

=?Utf-8?B?Q2FtZXJvbl9D?= <CameronC@discussions.microsoft.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Wed, 3 Dec 2008 17:02:01 -0800

Message-ID:

<A97511CE-757F-4535-AA8C-0671F24DC076@microsoft.com>

Hello once again,
Today I am here asking if anyone has ever called SYSDM.cpl from an MFC
program.
I have written my application to invoke sysdm.cpl from a button inside the
About Dialog box.
To be honest, I was being lazy and rather than define a bunch of system
related fields for a "systems Information" type of display, I thought I could
simply pop open the system dialog box.

This all works fine one time. When I click the button subsequent times,
nothing appears to happen. The click is processed, and the call is executed,
but that is all I have seen.

Here is the code fragment I have been working with.

/*
    The User is inquiring on their system.
*/
void CAboutDlg::OnBnClickedAboutSystem()
{
    PFN_ENTRY pfnEntryPoint=NULL;
    HINSTANCE hInstance=AfxGetInstanceHandle();
    HMODULE hModule=AfxLoadLibrary(_T("Shell32.dll"));
    if (hModule)
#ifdef _UNICODE
        pfnEntryPoint = (PFN_ENTRY) GetProcAddress(hModule, "Control_RunDLLW");
#else
        pfnEntryPoint = (PFN_ENTRY) GetProcAddress(hModule, "Control_RunDLLA");
#endif
    if (pfnEntryPoint)
        pfnEntryPoint(m_hWnd, hInstance, "sysdm.cpl,,0", SW_SHOW);
    AfxFreeLibrary(hModule);
}

This same code seems to work fine multiple times if I use ncpa.cpl or
timedate.cpl.
I just can't seem to get sysdm.cpl running more than one.
If I close the About Dialog, and re-open it, the system information does work.

Does anyone have any ideas I could try here?

Thanks,