problems with shellExecute

This is a discussion on problems with shellExecute within the Windows Programming forums, part of the Platform Specific Boards category; I have the following code: Code: void CAboutDlg::OnHelp() { //run shellExecute() on your html help HINSTANCE ShellExecute(CAboutDlg, NULL,"c:\drew\ElectronicPortfolioFiles\help.html",NULL,0); } but ...

  1. #1
    PC Fixer-Upper Waldo2k2's Avatar
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    problems with shellExecute

    I have the following code:
    Code:
    void CAboutDlg::OnHelp() 
    {
    	//run shellExecute() on your html help 
    	HINSTANCE ShellExecute(CAboutDlg, NULL,"c:\\drew\\ElectronicPortfolioFiles\\help.html",NULL,0);
    	
    }
    but when i compile, i get the syntax error: 'constant'
    what am i doing wrong?
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  2. #2
    the hat of redundancy hat nvoigt's Avatar
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    HINSTANCE

    What is this doing here ? If you need a returnvalue, give it a name.
    hth
    -nv

    She was so Blonde, she spent 20 minutes looking at the orange juice can because it said "Concentrate."

    When in doubt, read the FAQ.
    Then ask a smart question.

  3. #3
    PC Fixer-Upper Waldo2k2's Avatar
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    heres the revised code as you recommended...
    Code:
    void CAboutDlg::OnHelp() 
    {
    	//run shellExecute() on your html help 
    	/*note:don't need to escape backslashes,still works without them*/
     
    ShellExecute(CAboutDlg, NULL,"c:\drew\ElectronicPortfolioFiles\help.html",NULL,0);
    	
    }
    but now i get this error:
    'CAboutDlg':illegal use of this type as an expression
    the reason i threw HINSTANCE in was because the MFC help example showed it there. this thing is really annoying me...
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  4. #4
    Programming is fun, mkay?
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    Post I thought

    I thought the first arg. of ShellExecute() was an HINSTANCE...Not sure though

  5. #5
    Registered User
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    thats not an arg, that is the function type,
    if you went:
    Code:
    HINSTANCE hInstance;
    hInstance = ShellExecute();
    then it would be fine, the HINSTANCE is used for error checking and such.
    "There are three kinds of people in the world...
    Those that can count and those that can't."

  6. #6
    Davros
    Guest
    The first argument needs to be of type HWND, i.e. the handle of the window associated with you class.

    By calling:

    ShellExecute(CAboutDlg, NULL,"c:\drew\ElectronicPortfolioFiles\help.html", NULL,0);

    You seem to be trying to pass the CAboutDlg class itself, rather than a handle.

  7. #7
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    Sorry, i was giving an example of the HINSTANCE thing, wasnt worrying about parameters.
    "There are three kinds of people in the world...
    Those that can count and those that can't."

  8. #8
    PC Fixer-Upper Waldo2k2's Avatar
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    thanks everyone, im slowly working it out...this seems stupid, but where do i look to find the dialogs window handle?? i knew i should have just used api......oh well
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  9. #9
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    do you have a DialogProc of some sort?

    if you do, one of the params will be: HWND hDlg
    hDlg would be the handle of ur dialog
    "There are three kinds of people in the world...
    Those that can count and those that can't."

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