CryptSignMessage

function CryptSignMessage(

  pSignPara: PCRYPT_SIGN_MESSAGE_PARA;

  fDetachedSignature: BOOL;

  cToBeSigned: DWORD;

  rgpbToBeSigned: LPBYTE;

  rgcbToBeSigned: LPDWORD;

  pbSignedBlob: LPBYTE;

  var pcbSignedBlob: DWORD

):BOOL;