Source position: jwawincrypt.pas line 11750
function CryptMsgGetAndVerifySigner(
hCryptMsg: HCRYPTMSG;
cSignerStore: DWORD;
rghSignerStore: PHCERTSTORE;
dwFlags: DWORD;
ppSigner: PPCCERT_CONTEXT;
pdwSignerIndex: LPDWORD
):BOOL;