wxDC Blit is a function used in C++ programming language with the wxWidgets GUI library. It allows for efficient painting of images onto certain DC objects such as wxMemoryDC or wxGraphicsContext.
Here is an example code:
```c++
// Create a bitmap image
wxBitmap bitmap(100, 100);
wxMemoryDC dc(bitmap);
dc.SetBackground(wxBrush(wxColour(255, 255, 255))); // Set background color
dc.Clear(); // Clear device context
dc.DrawLine(0, 0, 100, 100); // Draw line
wxRect source(0, 0, 100, 100); // Define source rectangle
wxPoint dest(0, 0); // Define destination point
wxClientDC client(this); // Create client device context
client.Blit(dest, bitmap, source); // Blit the bitmap onto the client DC
```
In this example, a bitmap image is created with dimensions of 100 by 100 pixels. A memory device context is applied to the bitmap, and a line is drawn onto it. The source rectangle is defined to include the entire bitmap, and the destination point is set to (0, 0). The client device context is created, which is used to blit the bitmap onto the screen, using the wxDC Blit function.
wxDC Blit is part of the wxWidgets GUI library.
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