You can call PEcreate with a parent handle of zero. This will create a pure memory-based object with no Windows functionality. In other words, a Window is not created and no message handling or other event processing is available. You can use this memory object to set properties, pass data, and thus generate metafiles and other output as desired. Also, you can later attach a Window to this object by calling PEcreate again and this time passing a Window handle as nObjectType and providing a valid parent handle. It is this mechanism that allows ProEssentials' WinForm, ActiveX and VCL interfaces  to server as Windowless server components.

The developer using the WinForm, ActiveX or VCL interfaces can keep the ProEssentials object hidden and then use image export functions such as PEcopypngtofile or PEprintgraph. The WinForm, ActiveX and VCL interfaces function as Windowless server components if theyre never forced visible.

The function PEgetmeta can be used to retrieve a metafile handle of the objects current image. You can play this metafile into any Device Context (DC) as needed with the PEplaymetafile ProEssentials API call. Refer to printing sections within Chapter 2, 3, 4, and 5.