Learning AppleScript for Beginners

Heres an AppleScript for backing up a selected group of HyperCard files. this was used in one of my HyperCard stacks, but could be adapted for use in OSX programs with little or no modification:

send "suiteBkp(true)" to bg btn "BackupSuite" --Use this line to call the handler below (true displays a notification dialog when the process is complete, you must have a button named bg btn "BackupSuite"):

on suiteBkp(theBoolean)
copy line 1 of field "selectedFolder" to theHFFolderPath --You'll need a             hidden field named "selectedFolder" that a script (prior to the call) will place the path to the desired folder in.
tell application "Finder"
activate
set todaysDate to (current date)
set bkpYear to (year of todaysDate)
set monthlyBkp to ("Monthly Reports_" & bkpYear) as string
if exists (folder "HyperCard Backup") then
select folder "HyperCard Backup"
delete selection
end if
if exists (folder "HyperCard Backup" of folder theHFFolderPath) then
select folder "HyperCard Backup" of folder theHFFolderPath
delete selection
end if
make new folder at folder theHFFolderPath with properties {name:"HyperCard Backup"}
select {file "Appointments" of folder theHFFolderPath, ¬ file "HyperFile" of folder theHFFolderPath, ¬ file "Outstanding Invoices" of folder theHFFolderPath, ¬ file "Year" of folder theHFFolderPath, ¬ file monthlyBkp of folder theHFFolderPath, ¬
copy selection to folder "HyperCard Backup" of folder theHFFolderPath
select folder "HyperCard Backup" of folder theHFFolderPath
select file "Appointments" of folder ¬ "HyperFile Suite Backup" of folder theHFFolderPath
set name of selection to "Appointments.bkp"
select file "HyperFile" of folder "HyperCard Backup" of ¬ folder theHFFolderPath
set name of selection to "HyperFile.bkp"
select file "Outstanding Invoices" of ¬ folder "HyperFile Suite Backup" of folder theHFFolderPath
set name of selection to "Outstanding Invoices.bkp"
select file "Year" of folder "HyperFile Suite Backup" of ¬ folder theHFFolderPath
set name of selection to "Year.bkp"
set prefMonthlyBkp to (monthlyBkp & ".bkp") as string
select file monthlyBkp of folder "HyperFile Suite Backup" of ¬ folder theHFFolderPath
set name of selection to prefMonthlyBkp
select folder "HyperFile Suite Backup" of folder "The HyperFile Folder"
move selection to desktop
end tell
if theBoolean = "true" then
tell application "HyperCard"
activate
display dialog ¬ "Your backup has been saved to desktop." buttons {"Done"} default button {"Done"} with icon 129 giving up after 10
end tell
end if
end suiteBkp

more HyperTalk

Here's a simple, but very useful little HyperTalk script for verifying the validity of a date entered by a user, assuming that you have a menu item "flag date..." (or whatever you choose to name it) or it could be altered slightly and placed within a mouseUp statement:
if menuItem = "Flag Date..." then
global tryDate
ask "Enter a date for your new appointment:" with the long date
if it ≠ "" and the result ≠ "Cancel" then
put it into tryDate
else
put "" into tryDate
exit doMenu
end if
if invalidDate() then
answer "The date entered is not valid!"
put "" into tryDate
exit doMenu
end if
--Here you would put the statements to execute if the entered date proves to be valid

put "" into tryDate
end if

function invalidDate
global tryDate
convert tryDate to short date
if the result = "invalid date" then
return true
else
return false
end if
end invalidDate

more HyperTalk