When you pass an argument to SQL SP
you can do it this way (other ways will work too)

PRIVATE ln_vehiclekey, 
ln_vehiclekey = 1

iResult = ;
SQLEXEC(._iSQLConnHandle,"EXEC sp_GetVehicle ?ln_vehiclekey", "curresult")

>This code:
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>iResult = SQLEXEC(._iSQLConnHandle, [EXEC sp_GetVehicle @vehiclekey=1], sTableName)
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>generates the error "Could not find stored procedure 'EXEC sp_GetVehicle @vehiclekey=1'"
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>I can run this from SQL console:
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>EXEC sp_GetVehicle 1
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>Anyone know what I'm doing wrong?
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>Thanks