Congrats, looks nice.
Could add some more documentation to help users use it, something like:
"To add the DrawProgress control to your project, open an existing dialog (or create a new dialog) in RadASM and click the little progress bar icon in the toolbox (once the steps to install DrawProgress.dll have been done and RadASM has been restarted), then click on your dialog to 'draw' the new progress control to the size you require. Adjust any settings as required in the properties window."