Waiting for a process to finish

[rwellentrialex]

Looking for insight or direction. I have a series of pdfs in a folder. I've written the code (poorly I'm sure) to select all, right click and add to separate win-rar archives. I now want to unzip those .rar files to create separate folders but I need the process to wait until they've all been zipped up first. I tried using a sleep command but the number of pdfs will vary greatly from job to job. Below is the code I have so far. Also any insight into how I can select by file type would be great. Any help or guidance would be greatly appreciated!

^!a::
Send, {ctrl down}a{ctrl up}
Send, {RButton}

sleep, 200
Send, {Down}
Send, {Down}
Send, {Down}
Send, {Down}
Send, {Down}
Send, {Down}
Send, {Down}
;Send, {Down}
;Send, {Down}
;Send, {Down}
;Send, {Down}
sleep, 200
Send, {Enter}

sleep, 200
Send, {ctrl down}{Tab down}{Tab up}
Send, {Tab down}{Tab up}
Send, {Tab down}{Tab up}{ctrl up}
sleep, 200
Send, {Tab}
Send, {Tab}
Send, {Tab}
Send, {Tab}
Send, {Tab}
Send, {Tab}
Send, {Space}
Send, {Enter}

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