getting a DWORD registry value

Ok, so i can get the registry to give me a string, but i have a problem with getting a dword value. Here is an example of what i am trying to do:

Code:

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DWORD reg_value, dw;

if (RegQueryValueEx (Key, "SettingA", NULL, NULL, (LPBYTE) reg_value, &dw) != ERROR_SUCCESS)
        Alert("You have a problem!");

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However, even though i have the registry value "SettingA" set as 0x10 (16 dec) reg_value always turns out 0. Anyone know whats wrong?

Use the fourth parameter to see what type it actually is being stored as. Granted, "float" is not an option. If you put 0x10 into a float using a memcpy-type operation (which you did here), you will get a value of 2.2420775429197073e-44 back, which will probably print as 0 unless you print it with %e or %g.

reg_value is declared as a DWORD, not a float. I want to get 16dec into the variable reg_value which should work. Actually in my program I did use the fourth parameter and I am getting the correct type, the variable is simply not loading right. Can anyone provide a short example of how this is supposed to be done?

Wow. Don't ask me where I got float from, 'cause it's just not there. Anyway, the fifth parameter needs to be a pointer to the data.

I think im still missing something... is it right to cast reg_value to LPBYTE to pass it in, or does reg_value need to be a pointer? I just can't understand why this is goin on...

i got it... i didnt realize that i needed to pass it as "(LPBYTE) &reg_value" and not "(LPBYTE) reg_value". Thanks!

Not that confusing -- you got it right the second time:

Code:

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if (RegQueryValueEx (Key, "SettingA", NULL, NULL, (LPBYTE) &reg_value, &dw) != ERROR_SUCCESS)

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