Getting the filename from the %%F placeholer in a post-build event

Question

I have a post-build event as follows:

FOR %%F in ("$(SolutionDir)OcrLibrary\$(OutDir)*.dll") DO (IF EXIST "%%F" (ECHO "Skipped: %%F.") ELSE (COPY "%%F" "$(TargetDir)"))

%%F          > C:\Solution\OcrLibrary\bin\debug\*.dll
$(TargetDir) > C:\Solution\Project\bin\debug\
$(TargetDir)\GetFilename(%%F) > How to check for existence?

This enumerates *.dll files and copies them if they exist (which is not the intention). Instead it should check if they already in the target directory and skip them accordingly.

I couldn't figure out how to build a path to each target file using the %%F placeholder. Any pointers would be appreciated.