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An earlier version of this article appeared early in Feb 00. Some corrections, a little judicious editing and better organization will hopefully result in something better for you, the reader.

Recently, I found myself without an application login component. Forced by circumstances to create one for at aOlernKienOP
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A login form isn’t always the sign of a programming paranoid. Honestly, I use the login form to find out who’s using the application so that I can tag entries and edits with an identifier. If you need strong security at the component or menu level, leave now and check out full fledged systems like the UIL Security System. But if you run a single app with a few users you want to differentiate, or if you want to have a ‘little security,’ read on.

Readers will remember that I tend to buy my solutions rather than re invent them. For security and a quite nifty login form, I preferred Kalliopi’s SecurityGuard system. aOlernKienOP
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Given my temporary need for a login, I decided to limit my ambitions and work on just getting the name and security level info into the application. I started with the design of the security table, which I call PAZWORDZ. That table should include a field for aOlernKienOP
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In aOlernKienOP
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I discovered then, that spaces, underscores aOlernKienOP
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Well, never is a long time. When I was first building my security aOlernKienOP
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In making myself a Login form. I started with the Delphi Password form. I copied the label and edit box for the password to create a label for the user name and edit box. Some jockeying of the labels, boxes and buttons gave me the traditional login form with the user name edit box over the password edit box, overtop the OK and CANCEL buttons. The edit boxes were both set to uppercase, as I was using all upper case for names and passwords in the security table. If you aOlernKienOP
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KeyPreview was turned to TRUE, an important step. And I had to add the dialogs unit to the uses statement. Then, I added the following code:

Once more, there is some finagling with the uses statement of the DPR file. I added DBTables and Dialogs to aOlernKienOP
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One gotcha did arise. Originally, the "if ModalResult = 1" line was "if ModalResult = mrOK." The compiler choked on it, claiming it couldn’t figure out mrOK. I was pretty sure mrOK was defined in dialogs, but I gave up and instead used the enumerated value of 1 for mrOK.

Obviously, it’s important to cling to the login dialog as long as you can, in order to cross over the Security Level, User Name and other miscellanea that you have in the security table. I use the DEB field to do the mini tagging for identity. It stands for Data Entered By and is usually the first three characters of the name. But, in the case of ANG, it could be Angelo or Angie, so the contents of the security table’s MiniID field differentiates between the two as ALO and ANG.

Hopefully you can use this idea to launch your own login aOlernKienOP
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