aband

07D4 4 Autopilot altitude value, as metres*65536 Ok Ok offset 07D4 is 4byte value,I dont know how can I miss this! Stay up late to work is not wise. :mrgreen: here is the right function: if (!FSUIPC_Read(0x07D4,4, &AP.dwALT, &dwResult) || // If we wanted other reads/writes at the same time, we could put them here !FSUIPC_Process(&dwResult)) // Process the request(s) { SetDlgItemText(hwnd,IDC_EDIT_AP_ALT,TEXT("FAIL")); } else { wsprintf(AP.szALT,TEXT("%05d"),AP.dwALT/65536); SetDlgItemText(hwnd,IDC_EDIT_AP_ALT,AP.szALT); }

Got Problem to read the Autopilot altitude ! my envioroment:VS2008 FSX FSUIPCV4.2 the Autopilot altitude value explained in the manual:FSUIPC4 Offsets Status.pdf 07D4 4 Autopilot altitude value, as metres*65536 Ok Ok in my project I declare a struct: struct AUTOPILOT { int Status[6]; UINT uHDG;//heading TCHAR szHDG[256]; DWORD dwALT;//altitude TCHAR szALT[256]; UINT uAS;//air speed TCHAR szAS[256]; long lVS;//vertical speed TCHAR szVS[256]; }AP; and I use the following function to get the value of AP' altitude: if (!FSUIPC_Read(0x07D4,2, &AP.dwALT, &dwResult) || // If we wanted other reads/writes at the same time, we could put them here !FSUIPC_Process(&dwResult)) // Process the request(s) { SetDlgItemText(hwnd,IDC_EDIT_AP_ALT,TEXT("FAIL")); } else { wsprintf(AP.szALT,TEXT("%05d"),AP.dwALT/65536); SetDlgItemText(hwnd,IDC_EDIT_AP_ALT,AP.szALT); } but the AP.szALT always get the "00000" I make a break point on the "else" line,and check the value of the AP.dwALT in the debug mode,which I read in the offset 0x07D4. It's so weird,when the AP altitude valued in the FSX is 100,I got 31457(decimal system) from the AP.dwALT,more showed below: FSX AP.szALT (decimal system) 0 00000 100 31457 200 32915 300 28836 1000 52428 99900 34048 I dont know what is going wrong with my code and very confuse about this. :oops: Very appreciate if somebody Colud help me!