Registry Problems ( RegSetValuEx )

This is a discussion on Registry Problems ( RegSetValuEx ) within the Windows Programming forums, part of the Platform Specific Boards category; Hey everyone, I'm having a bit of a problem when I save an entry into the registry. It'll story any ...

  1. #1
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    Registry Problems ( RegSetValuEx )

    Hey everyone,

    I'm having a bit of a problem when I save an entry into the registry. It'll story any number less than 100, however if the number (aka the variable: trigger_key ) is equal to or greater than 100 (no larger than 255), it saves a random value.


    Code:
    HKEY hk;
    DWORD dwDisp;
    TCHAR dwData[120];
    
    RegCreateKeyExA(HKEY_CURRENT_USER, "SOFTWARE\\MacroKeys", 0, NULL, REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hk, &dwDisp);
    
    _stprintf ( dwData, _T("%d"), trigger_key );
    RegSetValueEx(hk, _T("trigger_key"), 0, REG_DWORD, (PBYTE)&dwData, sizeof(PDWORD));
    Here is my code to retrieve the value
    Code:
    HKEY hk;
    DWORD dwType;
    DWORD dwLength;
    TCHAR val[120];
    
    RegOpenKeyExA(HKEY_CURRENT_USER, "SOFTWARE\\MacroKeys", 0, KEY_QUERY_VALUE, &hk);
    
    RegQueryValueEx(hk, _T ( "trigger_key" ), NULL, NULL, (LPBYTE)val, &dwLength);
    trigger_key = _ttoi ( val );

    Any help will be appreciated.

    Thanks,

    Matt N
    Last edited by guitarist809; 05-07-2008 at 07:16 PM.
    ~guitarist809~

  2. #2
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    1. declare your variable dwData as a DWORD.

    2. Remove the _stprintf line.

    3. Check the return value of RegCreateKeyExA

    long ret = RegCreateKeyExA...

    4. Set the dwData value : dwData = trigger_key;

    5. Change the RegSetValueEx :
    Code:
            if( ret == ERROR_SUCCESS )
            {
                 RegSetValueEx(hk, _T("trigger_key"), 0, REG_DWORD, (CONST BYTE*)&dwData, sizeof(dwData));
            }
    These changes worked for me.
    Last edited by DaveH; 05-07-2008 at 08:47 PM.

  3. #3
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    Quote Originally Posted by DaveH View Post
    1. declare your variable dwData as a DWORD.

    2. Remove the _stprintf line.

    3. Check the return value of RegCreateKeyExA

    long ret = RegCreateKeyExA...

    4. Set the dwData value : dwData = trigger_key;

    5. Change the RegSetValueEx :
    Code:
            if( ret == ERROR_SUCCESS )
            {
                 RegSetValueEx(hk, _T("trigger_key"), 0, REG_DWORD, (CONST BYTE*)&dwData, sizeof(dwData));
            }
    These changes worked for me.
    Thank you! Worked like a charm (for saving)...
    Last edited by guitarist809; 05-07-2008 at 09:34 PM.
    ~guitarist809~

  4. #4
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    Ok, now for some reason, whenever I try to load the values, they get reset to 0.

    Code:
    HKEY hk;
    	DWORD dwType;
    	DWORD dwLength;
    	DWORD val;
    
    	long ret = RegOpenKeyEx(HKEY_CURRENT_USER, _T("SOFTWARE\\AntiRecoil"), 0, KEY_QUERY_VALUE, &hk);
    
    	if ( ret != ERROR_SUCCESS )
    		return 1;
    
    	RegQueryValueEx(hk, _T ( "k_trigger" ), NULL, NULL, (LPBYTE)val, &dwLength);
    	k_trigger = val;
    ~guitarist809~

  5. #5
    Madly in anger with you
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    RegQueryValueEx(hk, _T ( "k_trigger" ), NULL, NULL, (LPBYTE)val, &dwLength);
    should be:

    RegQueryValueEx(hk, _T ( "k_trigger" ), NULL, NULL, (LPBYTE)&val, &dwLength);

    Intel Core 2 Quad Q6600 @ 2.40 GHz
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  6. #6
    a_capitalist_story
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    Looks like you're writing using "trigger_key", while you're reading "k_trigger"?

  7. #7
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    Quote Originally Posted by rags_to_riches View Post
    Looks like you're writing using "trigger_key", while you're reading "k_trigger"?
    Yeah, don't worry about that (i changed trigger_key to k_trigger, forgot to post it)

    And thanks Bleech, for the quick response (the mistake was so simple, now I feel like an idiot )
    ~guitarist809~

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