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Learn About The Handle Property in DelphiVCL.Application

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In this post, you’ll learn more about the Handle property or DelphiVCL.Application.Handle is used to provide access to the underlying Windows screen object for the control. The Handle property returns the window handle for the underlying Microsoft Windows screen object. Use the Handle property to bypass the VCL API and directly access the underlying window.

Do not refer to the Handle property during component creation or streaming. The underlying window does not exist until the first time the Handle property is referenced. When this occurs, the HandleNeeded method is called automatically. The Handle is a read-only property.

Note: On Win64, the size of HANDLE types has changed to 64-bits –except for OLE_HANDLE, which is now a 32bit Long even in Win64. This means that you need to change any code that assumed OLE_HANDLE and other HANDLE types are interchangeable. Read this link for additional information: http://stackoverflow.com/questions/401812/what-is-the-proper-way-to-cast-from-an-ole-handle-to-an-hicon.

Learning more about the Handle Property will help you build a Python project more easily in the future with Delphi VCL Application.

How to browse the properties and methods of DelphiVCL.Application.Handle?

Let’s browse all the properties and methods of DelphiVCL.Application.Handle using dir() command:

See the responses in our Windows command prompt:

0dir-6609362

You can also read short information about the DelphiVCL.Application.Handle using the print() command:

See the responses in our Windows command prompt:

0print-4951472

 

Check out DelphiVCL which easily allows you to build GUIs for Windows using Python.

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