#define STCRAddress 0x6A17F0

typedef void (__stdcall* PFN_CField_SendTransferChannelRequest)(int nChannel);

PFN_CField_SendTransferChannelRequest CField_SendTransferChannelRequest = reinterpret_cast<PFN_CField_SendTransferChannelRequest>(STCRAddress);

button1 click:

CField_SendTransferChannelRequest(1);