Здравствуйте, m_kostik, Вы писали:

_>SERVICE_CONTROL_STATUS_REASON_PARAM ETR AddParametr;

_>rez = ControlServiceEx(hService, dwControl, SERVICE_CONTROL_STATUS_REASON_INFO, &AddParametr);

BOOL WINAPI ControlServiceEx(
__in SC_HANDLE hService,
__in DWORD dwControl,
__in DWORD dwInfoLevel,
__in_out PVOID pControlParams
);

Если он __in_out — значит, на входе надо в нем что-то задавать, а у тебя в нем мусор.

SERVICE_CONTROL_STATUS_REASON_PARAMS Structure

dwReason
The reason for changing the service status to SERVICE_CONTROL_STOP. If the current control code is not SERVICE_CONTROL_STOP, this member is ignored.

This member must be set to a combination of one general code, one major reason code, and one minor reason code.