jd

do it the math this way x / 65536 / 65536 * 360

you have to do some conversions here is my routine to set the plane at the proper lat/long/alt Public Function set_plane(lat As Single, lon As Single, alt As Single, hdg As Single) As Boolean Dim x As Long Dim dwresult As Long x = FTOM(CLng(alt)) Call FSUIPC_Write(&H574, 4, VarPtr(x), dwresult) x = lat * 10001750 / 90 Call FSUIPC_Write(&H564, 4, VarPtr(x), dwresult) x = lon * 65536 * 65536 / 360 Call FSUIPC_Write(&H56C, 4, VarPtr(x), dwresult) x = hdg * 65536 * 65536 / 360 Call FSUIPC_Write(&H580, 4, VarPtr(x), dwresult) Call FSUIPC_Process(dwresult)

Call FSUIPC_WriteS(&H8001&, Len(fsuipckey), fsuipckey, dwResult) ' Call FSUIPC_Process(dwResult) where fsuipckey is a string containing the key (no spaces), concatenated with a null jd

for the ai aircraft, that data is in the tcas tables. check the documentation for specifics jd

my vb does unsigned arithmetic :-)

you're probably overflowing the magvar variable i use MagVar = MagVar / 65536 * 360 what is the real magnetic variation where you're at? i'm betting that it is really -20, which will yield a number slightly higher than 360 so you will need a routine to take a heading that is larger than 360, and normalize it to a number between 0 and 359 jd

no idea, sorry jd

Function norm360(h As Long) As Long If h > 360 Then norm360 = h - 360 ElseIf h = 0 Then norm360 = 360 ElseIf h < 0 Then norm360 = h + 360 Else norm360 = h End If End Function

here is my code snippet Public Function Plane_heading() As Single ' degrees Plane's magnetic heading. Dim x As Long Dim dwResult As Long Call FSUIPC_Read(&H580, 4, VarPtr(x), dwResult) Call FSUIPC_Process(dwResult) Plane_heading = norm360((x / 65536 / 65536 * 360) - magvar) end function you may have to adjust for the magnetic variation, which is what magvar is (another function, to get the current magnetic variation) norm360 is a normalize function, which brings all heading to a range of 1-360 degrees

twenty degree magnetic variation would put you within 1 degree of the number you gave me jd

and what was the magnetic variation? jd

what was your plane heading?

i don't know what to say. this is the function i have used in radar contact since v3. it works, because i'm constantly checking the plane heading.. Public Function Plane_heading() As Single Dim x As Long Dim dwResult As Long Call FSUIPC_Read(&H580, 4, VarPtr(x), dwResult) Call FSUIPC_Process(dwResult) Plane_heading = x / 65536 / 65536 * 360 End Function

it's vb6, and the code has worked that way from v3.x through v4.x without a problem.

Public Function Plane_heading() As Single Dim x As Long Dim dwResult As Long Call FSUIPC_Read(&H580, 4, VarPtr(x), dwResult) Call FSUIPC_Process(dwResult) Plane_heading = x / 65536 / 65536 * 360 End Function

for plane altitude, i use the following Dim x As Long Dim dwResult As Long Call FSUIPC_Read(&H574, 4, VarPtr(x), dwResult) 'meters Call FSUIPC_Process(dwResult) Plane_Alt = Mtof(CSng(x))

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what is the value if sim_any when you call the fsuipc_open? breakpoint there, and hover the variable.

i'm assuming SIM_ANY is defined? i'm assuming fs is running when you try this button click? suggest you breakpoint at every fsuipc call, and make sure all your variables contain the right values, and find which call causes the error message jd

let's see the code

definately fsuipc_open, also test for slew = 1 not dwresult = 1

and roll ;-)

here is my code Public Function Plane_Bank() As Single Dim x As Long Dim dwResult As Long Call FSUIPC_Read(&H57C, 4, VarPtr(x), dwResult) Call FSUIPC_Process(dwResult) Plane_Bank = x / 65536 / 65536 * 360 End Function

i editted my post. the varialbe uiroll will contain the roll value in terms that are specified in the fsuipc sdk manual for programmers. dwresult simply is a variable used for success or failure

my best guess would be call fsuipc_read(&H057c,5,varptr(uiroll),dwreseult) call fsuipc_process(dwresult) you may have to do some math on the variable uiroll to get it in terms that you need jd