why doesn't the registry work?

This is a discussion on why doesn't the registry work? within the Windows Programming forums, part of the Platform Specific Boards category; why is it, that I can save some registry info and it works in XP, but when i run the ...

  1. #1
    Software Developer jverkoey's Avatar
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    University of Waterloo
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    why doesn't the registry work?

    why is it, that I can save some registry info and it works in XP, but when i run the same program on 98, it doesn't do anything?

    here is my code:

    Code:
    //include stuff
    
    void writetoKey(HKEY keypath, char *keyname, unsigned int type, char *value)
    {
    	unsigned long result;
    	HKEY key;
    
    	RegCreateKeyEx(
    		keypath,
    		keyname,
    		0,
    		NULL,
    		REG_OPTION_NON_VOLATILE,
    		KEY_SET_VALUE,
    		NULL,
    		&key,
    		&result
    		);
    
    	switch(result)
    	{
    	case REG_CREATED_NEW_KEY:
    		cout << "Created new key" << endl;
    		break;
    	case REG_OPENED_EXISTING_KEY:
    		cout << "Key already existed, rewriting" << endl;
    	}
    
    	RegSetValueEx(
    		key,
    		NULL,
    		0,
    		type,
    		(LPBYTE)value,
    		strlen(value)+1
    		);
    
    	RegFlushKey(key);
    	
    	RegCloseKey(key);
    }
    
    int main()
    {
    	char fullpath[]="C:\testfolder\EXE\OpenScript.exe %1";
    	char tempname[]="ost_auto_file";
    
    	char tempname2[]="%SystemRoot%\\system32\\NOTEPAD.EXE %1";
    
    	writetoKey(HKEY_CLASSES_ROOT,".ost",REG_SZ,tempname);
    	writetoKey(HKEY_CLASSES_ROOT,"ost_auto_file\\shell\\edit\\command\\",REG_EXPAND_SZ,tempname2);
    	writetoKey(HKEY_CLASSES_ROOT,"ost_auto_file\\shell\\open\\command\\",REG_EXPAND_SZ,fullpath);
    	return 1;
    }
    any help would be greatly appreciated. I need to know if there is a way to edit the registry on ALL (or most) operating systems...

    -thanks in advance

  2. #2
    Skunkmeister Stoned_Coder's Avatar
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    Aug 2001
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    2,572
    which api function fails? what does GetLastError() return. Use FormatMessage() to get a string error msg. I know people who program for windows who wrap up every api call in a macro that calls GetLastError and FormatMessage. That could bbe useful for debugging things like this but I wouldnt advise using macros in c++.
    Free the weed!! Class B to class C is not good enough!!
    And the FAQ is here :- http://faq.cprogramming.com/cgi-bin/smartfaq.cgi

  3. #3
    Software Developer jverkoey's Avatar
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    ok, lmao, it turns out, it was elsewhere in my code

    in my installer, i have to call my wrap program (wrap.exe) and it returns a value as to whether or not an error occured, so i did something like so:
    if(!system("wrap.exe Installdata.wrap C:\testfolder"))
    return 0;

    in other words, it's kinda like a function, but actually running another exe....

    now, i noticed that i tried to output stuff after i had unwrapped everything, and it wouldn't output anything in 98....so what i'm guessing is that windows doesn't support jumping back IN to the calling program, and that it just stops after the called one is done.....

    i don't know, i'm just assuming that, maybe someone else can give some light to this situation?

  4. #4
    Registered User johnnie2's Avatar
    Join Date
    Aug 2001
    Posts
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    Originally posted by jverkoey
    now, i noticed that i tried to output stuff after i had unwrapped everything, and it wouldn't output anything in 98....so what i'm guessing is that windows doesn't support jumping back IN to the calling program, and that it just stops after the called one is done.....
    Or the wrap program stalls and never returns control to the caller.
    "Optimal decisions, once made, do not need to be changed." - Robert Sedgewick, Algorithms in C

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