Signing data with user specified Key

[SHARMA Sandhya (MORPHO)]

Hello,

I am using GPG4Win and have to sign data with a specified key through my code in C++.But I didn't find much help on how to specify key for signing data in GPG document.
Please find the below lines of code I am using for signing data:
error = gpgme_op_sign(context,Plaindata,Signdata,GPGME_SIG_MODE_NORMAL);
       PRet = (char*)gpgme_strerror(error) ;
       gpgme_sign_result_t result = gpgme_op_sign_result(context);


Thanks & Regards
Sandhya Sharma

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