Code that runs one time only

[shod90]

Dear Gents,


I need help please in the following problem:
I need to make an activation form if the correct activation code was written , then the application runs normally after that , If not i need to prompt the user with that activation form until he write the correct activation code.

[ranman256]

You could use API calls: WritePrivateProfileString,and GetPrivateProfileString to write to the registry.when the start form opens, getPrivateProfile to see if the setting exists in the registry,

If not, WritePrivateProfileString to write the false password to the registry,
reg=MyProgram
pass=ABCDE
Valid=false.

if it does exist, ask user to enter password,
compare his entry with the registry entry via, GetPrivateProfileString
if it matches,WritePrivateProfileString,
reg=MyProgram
pass=ABCDE
Valid=true.

now that valid is true,never ask user for password again.
You could also use a table,instead of registry. Either can work for normal users. But both can be defeated by a pro access user. But I'm sure regular users won't try to skirt the code.