You can combine two variables like this:
Variable 1: {PATH(GetFileName,C:\Program Files\VisualCron 4\VisualCronClient.exe)}
Variable 2: {STRING(ToUpper,AnyString)}
You want to make upper characters of Variable 1. You can accomplish this by the combined variables below:
{STRING(ToUpper,{PATH(GetFileName,C:\Program Files\VisualCron 4\VisualCronClient.exe)})}
NOTE: VisualCron uses comma "," to separate variable parameters. If you Variable 1 contains commas you will have problems unless you use the alternate variable separation, pipe "|". This is only possible from version 4.8.3. of VisualCron. A combined variable may look like below with pipes instead:
{STRING(ToUpper|{PATH(GetFileName|C:\Program Files\VisualCron 4\VisualCronClient.exe)})}