I have a simple funciton which performs password validation for atleast 1 UpperCase, 1 LowerCase and 1 Numeric in the 
string provided by user as password.

For this am using the regex functions that QNX provides. I have provided a sample function below.

Am providing the following Regex pattern and datastring for validation:
pszRegexPattern : "^.*(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9]).*$"
pszDataString      : "Admin1"

When I call the funciton with these arguments I get that the data string does not match regex pattern, whereas when i 
try the same validation on Windows I get a success.

Can anyone please tell me what i might be missing on QNX?

#include <regex.h>

bool  ValidateUsingRegex(const schar* pszRegexPattern,
                         const schar* pszDataString)
{
   bool bStrValid = false;

   sint32 iResult = EOK;
   regex_t obRegexPattern;
   char    errorBuffer[512U];

   if ((0U == regcomp( &obRegexPattern, pszRegexPattern, REG_NOSUB)))
   {
      printf("Successfully created  %s", obRegexPattern.re_endp);
      if((iResult = regexec(&obRegexPattern, pszDataString, 0, NULL, 0)) == 0U)
      {
         bStrValid = true;
		 printf("ValidateUsingRegex: String %s Validated", pszDataString);
      }
      else
      {
         regerror(iResult, &obRegexPattern, errorBuffer, sizeof errorBuffer);
		 printf("ValidateUsingRegex: Failed %s (%s)\n",errorBuffer, pszDataString);
      }
   }
   else
   {
      regerror(iResult, &obRegexPattern, errorBuffer, sizeof errorBuffer);
      printf("ValidateUsingRegex: RegComp() Error Num %x -> %s (%s)\n",iResult,errorBuffer,pszRegexPattern);
   }
   regfree(&obRegexPattern);

   return bStrValid;
}