Parameters:
/InFile Input file name, e.g. D:\DXFs\Plan.dxf
/OutFile Output file name, e.g. D:\DWGs\Plan.dwg
/OutVer Output file version, available values:
    2007 2004 2000 R14 R13 R12 R10 R9
    default = 2000
Example:
DevConv.exe /InFile D:\DXFs\Plan.dxf /OutFile D:\DWGs\Plan.dwg /OutVer 2007