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8.5

Miracle needed. (Overriding Windows colors)

Asked by Workshop_Alex in Delphi Programming

Tags: Delphi 6 (not 2006!)

Well, my employer asks for miracles and in general, I just deliver them. :-) But now he wants to know if I can change the colors of an existing application within a very short amount of time. Basically, the application has 140+ forms which all use the default Windows colors for the controls, buttons, editboxes, etc.
Well, that wasn't difficult. I connected an event to Screen.OnActiveFormChange which will walk through all the controls on the active form and adjust the colors on each of them. Basically, about 80% of all colors are now configurable. What remains are the more complicated things...

My employer also wants a different color for popup menu's, for any selected text, for the form caption and several other parts of the controls which don't have any properties to set to change them. Thus, I need to override the way how my application gets the proper color values from the Windows system.

For example, the default color for selected text in an editbox is black text on a blue background. It needs to become blue text on an orange background.

Yes, I could create my own custom controls and forms which all have their own customdraw methods but that takes a lot of work, since it means I have to change 140 different forms. I need a more generic solution which can be applied to each and every control, no matter what kind of control it is.

I've considered to hook one or more Windows API functions which are used to retrieve these colors but would it work? And how should that be done?

And no, I can't add any third-party components to this project.

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20091111-EE-VQP-92 / EE_QW_2_20070628

Miracle needed. (Overriding Windows colors)

Asked by Workshop_Alex in Delphi Programming

Tags: Delphi 6 (not 2006!)

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