Widget Technologies How-To


Misc: Load images in to a ListView Load a TreeView the hard way, dynamically. Use a custom sort on a ListView Add menu's dynamically

These next few How-To's deal with printing, behaviors of printing, and changing the behaviors of printers. Builder uses the TPrinter to encapsulate this and takes alot of the headaches out of it for you, but it does have some drawbacks. For instance, if I am on a network and I want to send information to a printer I have to use the PrintDialog->Execute method to get a handle to the printer. The times that I have tried to print without using the TPrinter Execute method, an exception was thrown. Load all available printers on a user system. Get the default printer on a users system. Change the orientation of the printer dynamically. Size and lengths of information to be printed. Paper size of the printer with the selected font Change printer font Print information to the printer.

The next few How-To's deal with DLLs, both dynamically and static.

To load a DLL dynamically.
To call a function in that DLL.
This deals with how to use a form in a DLL. This example is not dynmaic, it is static. Click here to download testdllform.zip The program was created using Builder 6.

Hooks:
Because this is a very complex topic there is a page dedicated to this subject. It covers what a hook is, how to set the hook, how to remove the hook, why you might need a hook, and some debugging tips that I have found the hard way.