CryptVerifyMessageSignature

function CryptVerifyMessageSignature(

  pVerifyPara: PCRYPT_VERIFY_MESSAGE_PARA;

  dwSignerIndex: DWORD;

  pbSignedBlob: LPBYTE;

  cbSignedBlob: DWORD;

  pbDecoded: LPBYTE;

  pcbDecoded: LPDWORD;

  ppSignerCert: PPCCERT_CONTEXT

):BOOL;