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Convert LPCSTR command line parameter to DWORD

Posted on 2004-11-12
Medium Priority
Last Modified: 2013-11-20

rookie question:

I'm using API that expects DWORD value as one of its parameters. Other parameters use LPCSTR and work fine. How do I convert and pass this value from the command line? I don't really care what format the command-line param will be in- it can be either a number or the XXXX_DISABLED string.

Many thanks,
Question by:dcx45
LVL 48

Accepted Solution

AlexFM earned 375 total points
ID: 12564769
You can convert string to number using atoi function or sscanf. sscanf returns number of successfully converted characters, this allows to test whether command line contains valid number.

Expert Comment

ID: 12575185
strtoul converts a string to an unsigned long (DWORD):
strtoul(const char *nptr,  char **endptr,  int base);

So in your case, if you have an LPCSTR named "lpszStr" you may want to use:

DWORD dwValue = strtoul(lpszStr, NULL, NULL);

The function's prototype is located in stdlib.h, so be sure to include it...

Good luck,
      Stuart Konen


Author Comment

ID: 12615603
Guys, both comments v. helpful, points go to Alex as he was first and the solution worked...

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