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Help with the "GAK" sample shell extension

Posted on 1998-04-13
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Last Modified: 2012-05-04
I am primarilly a VB programmer.  However, I have a need to create a Shell Extension just like the "GAK" sample shell extension distributed by Microsoft.

If is use the DLL supplied with the sample it works fine.

I have VC 5.0 (DevStudio).  The sample does is, I guess to old, to be supplied with a "Workspace" for VC5.  I've tried a number of times to load this sample into VC5 and build the DLL.  The DLL I create will not work.

Can anyone help me to build a DLL from this sample that will work?

Thanks
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Question by:MarkO
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Expert Comment

by:RONSLOW
ID: 1184249
Will not work?  Do you mean will not compile? will not link? does not work correctly after compiling/linking?

Has the extension been installed/registered correctly?  Because, if not, then it will never get to run.

Also, ensure you have set the warning level to the highest (4) for the compiler (just in case).

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Author Comment

by:MarkO
ID: 1184250
Does not work after compiling/linking.  I create the DLL, and register it (just as I did the sample DLL).

Also, I realize that the GUID's have to be correct when registering the Shell Extension.  I've done everything I know to ensure this.  I beleive I got that all correct.  
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Author Comment

by:MarkO
ID: 1184251
Adjusted points to 40
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Expert Comment

by:jann
ID: 1184252
If you run your program in Debug mode, is there any error or warning message shown?

Did you use implicit link or explicit link?
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Author Comment

by:MarkO
ID: 1184253
Status report: O.K. Starting over.  
1 - I've tried to create a workspace and load all of the files. OK so far, I thing.

2 - Build the DLL.  the following errors.  Now I'm not a VC programmer.  (I'm a VB guru) Where do I start????

Errors:
--------------------Configuration: ShellExt - Win32 Debug--------------------
Compiling...
Propshet.cpp
Linking...
Propshet.obj : error LNK2001: unresolved external symbol __imp__DestroyPropertySheetPage@4
Propshet.obj : error LNK2001: unresolved external symbol __imp__CreatePropertySheetPageA@4
Debug/ShellExt.dll : fatal error LNK1120: 2 unresolved externals
Error executing link.exe.
Creating browse info file...

ShellExt.dll - 3 error(s), 0 warning(s)

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Expert Comment

by:RONSLOW
ID: 1184254
Ah .. so the problem is that it does not link --- you'd told us before that it compiled and linked ok and didn't work.  This is different.

Looks like it is not finding a required external symbol (:-) .. where aer DestroyPropertySheetPage and CreatePropertySheetPage defined?  Have you got an import library for these included in your project?
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Expert Comment

by:RONSLOW
ID: 1184255
I just built it ok .. needed to add
  comctl32.lib
to the list of library modules in the link settings for your project

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Author Comment

by:MarkO
ID: 1184256
Not really different. I'm just starting over.  On my first attempts I got these same errors.  I removed the portions of the sample related to the property page extension.  This is when it compiled/linked fine.  So now I'm just starting over from the beginning, thinking that this might have somthing to do with the problem.

Question was: Have you got an import library for these included in your project?
Answer: This is where I get lost.
Would I be looking for somthing like this

#ifndef _PRSHT_H_
#define _PRSHT_H_

//
// Define API decoration for direct importing of DLL references.
//
#ifndef WINCOMMCTRLAPI
#if !defined(_COMCTL32_) && defined(_WIN32)
#define WINCOMMCTRLAPI DECLSPEC_IMPORT
#else
#define WINCOMMCTRLAPI
#endif
#endif // WINCOMMCTRLAPI

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Author Comment

by:MarkO
ID: 1184257
Yes, this allowed me to compile without removing the Property page stuff.

Now for the original problem.  This DLL will not work.  The sample DLL works fine.  When I replace it with the one I created it stops working.

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Expert Comment

by:RONSLOW
ID: 1184258
I built it an it all works fine .. do you want me to send you my project etc?

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Author Comment

by:MarkO
ID: 1184259
If you built one that actually works that would be great if you could send it to me.  (zipped would be fine)

Email it to me at   marko@ipass.net    and I'll see if I can get it to work.

Then post another answer for me to close this question.

Thanks
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Accepted Solution

by:
RONSLOW earned 40 total points
ID: 1184260
Sorry for the delay

I built it and installed the REG file and copied the shellext.dll from the release area to C:\Windows\System and it worked.  TO make sure, I changed the icons a bit (put some pretty pink in them) so that I knew it was my shellext.dll and not the pre-built one.

I will a zip of the project to marko@ipass.net now

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