OE .NET GUI is not that much different from any other PCT Compile:
<PCTCompile
destDir="."
graphicalMode="true"
dlcHome="${progress.DLC}"
md5="true"
minSize="false"
cpinternal="iso8859-1"
cpstream="iso8859-1"
compileUnderscore="true"
inputchars="16000"
assemblies="Assemblies"
iniFile="ini/progress.ini"
token="4000"
progPerc="10"
tempDir="/temp">
<fileset
dir="."
casesensitive="false">
<patternset
refid="smartcomponents.sources.smartcomponents"/>
</fileset>
<propath
refid="smartcomponents.propath.default"
/>
<DBConnection
dbName="sports2000"
dbDir="../DB/sports2000"
singleUser="false"
/>
</PCTCompile>
Graphical mode should be true and assemblies must be set.