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How To Use The Comprehensive Form Properties In C++ VCL Apps

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Forms (TForm) in VCL Framework and Its Properties

TForm represents a standard application Form window. When we create forms in the Form designer at design time, they are implemented as descendants of TForm. Forms can represent the application’s main window, or dialog boxes, or MDI children. A form can contain other objects, such as TButton, TCheckBox, and TComboBox objects. All the Properties of Forms in FireMonkey frame work can be found here and Methods of Forms can be found here in official DocWiki.

How To Use The Comprehensive Form Properties In C++ VCL Apps - styled forms

Let’s give some examples of its properties. We can set or change properties (Caption, WindowsState, Color, TransparentColor, Visible, ShowHint, Tag, and more) of Forms on design with Object Inspector panel and on runtime, For example, we can set Caption or Hint of Forms on runtime. Here is an example to set some of the properties that we mostly used,

We can also get some information about our Form that we set on design time or they can be changed on run time because of Windows State, Border Kind, Alignments, FullScreen property, etc. Here is an example to get Caption, ClientWidth, ClientHeight, Width, Height of the form.

We can use Hide() and Show() methods to hide and show our forms. We can use SendToBack() and BringtoFront() methods, to send our form to the back or to bring to front. There are many methods and properties that we can use. All the Properties of Forms in FireMonkey frame work can be found here and Methods of Forms can be found here in official DocWiki.

Forms are one of the most important parts of our applications, so each property may change your application behavior. Some details about your forms may improve your quality of images, animations and speed of drawings.

How To Use The Comprehensive Form Properties In C++ VCL Apps - multi-device forms


Another great feature of Forms are Styles that works on all official UI elements of VCL Framework as a skin. You can easily apply skins to your forms and components on it. You can also create your own style with the Style Manager. We explained in our posts before that how you can apply styles on VCL applications and styles on FMX applications.


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About author

Dr. Yilmaz Yoru has 33+ years of coding with more than 30+ programming languages, mostly C++ on Windows, Android, Mac-OS, iOS, Linux, and some other operating systems. He was born in 1974, Eskisehir-Turkey, started coding in college and graduated from the department of Mechanical Engineering of Eskisehir Osmangazi University in 1997. He worked as a research assistant at the same university for more than 10 years. He received his MSc and PhD degrees from the same department at the same university. Since 2012, he is the founder and CEO of Esenja LLC Company. He has married and he is a father of a son. Some of his interests are Programming, Thermodynamics, Fluid Mechanics, Artificial Intelligence, 2D & 3D Designs, and high-end innovations.
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