What is windows HDC?
HDC : Stands for Handle to Device Context. this structure is used to obtain graphical components. PAINTSTRUCT : This is the Paint Structure. this structure allows to draw shapes.
What is Hwnd Win32?
HWND is a “handle to a window” and is part of the Win32 API . HWNDs are essentially pointers (IntPtr) with values that make them (sort of) point to a window-structure data. In general HWNDs are part an example for applying the ADT model.
What is Wm_paint message?
The WM_PAINT message is sent when the system or another application makes a request to paint a portion of an application’s window.
What is the purpose of WM destroy message?
It is sent to the window procedure of the window being destroyed after the window is removed from the screen. This message is sent first to the window being destroyed and then to the child windows (if any) as they are destroyed.
What is device context?
A data structure in Windows programming that is used to define the attributes of text and images that are output to the screen or printer. The device context (DC) is maintained by GDI. A DC, which is a handle to the structure, is obtained before output is written and released after the elements have been written.
What is handle to device context?
The GetDC function retrieves a handle to a device context (DC) for the client area of a specified window or for the entire screen. You can use the returned handle in subsequent GDI functions to draw in the DC. The device context is an opaque data structure, whose values are used internally by GDI.
What does Hwnd mean?
HWND
| Acronym | Definition |
|---|---|
| HWND | Handle to a Window |
| HWND | Handle to A Window (Windows programming) |
| HWND | Hardcore Will Never Die |
What is Hwnd type?
HWND data types are “Handles to a Window”, and are used to keep track of the various objects that appear on the screen. To communicate with a particular window, you need to have a copy of the window’s handle. HWND variables are usually prefixed with the letters “hwnd”, just so the programmer knows they are important.
What is Wm_create?
WM_CREATE message is received by window procedure when window is created and not shown yet. You can prepare initial state. For example, you can create controls (child windows), set default values for controls, etc. If something is wrong, you can cancel creation of window and it will not be shown.
What is subclass of window?
Subclassing is a technique that allows an application to intercept and process messages sent or posted to a particular window before the window has a chance to process them. By subclassing a window, an application can augment, modify, or monitor the behavior of the window.
When should I call DestroyWindow?
When to Call delete. We recommend that you call DestroyWindow to destroy a Windows object, either the C++ method or the global DestroyWindow API.
What is memory device context?
It is an array of bits in memory that an application can use temporarily to store the color data for bitmaps created on a normal drawing surface. Because the bitmap is compatible with the device, a memory DC is also sometimes referred to as a compatible device context.