The WM_PRINTCLIENT message is sent to a window to request that it draw its client area in the specified device context, most commonly in a printer device context.
WM_PRINTCLIENT
hdc = (HDC) wParam;
uFlags = lParam;
Parameters
hdc
Identifies the device context to draw in.
uFlags
Specifies drawing options. This parameter can be one or more of these flags:
| Value | Meaning |
| PRF_CHECKVISIBLE | Draw the window only if it is visible. |
| PRF_CHILDREN | Draw all visible children windows. |
| PRF_CLIENT | Draw the client area of the window. |
| PRF_ERASEBKGND | Erase the background before drawing the window. |
| PRF_NONCLIENT | Draw the nonclient area of the window. |
| PRF_OWNED | Draw all owned windows. |
Remarks
A window can process this message in much the same manner as WM_PAINT, except that BeginPaint and EndPaint need not be called (a device context is provided), and the window should draw its entire client area rather than just the invalid region.
Windows that can be used anywhere in the system, such as controls, should process this message. It is probably worthwhile for other windows to process this message as well because it is relatively easy to implement.
See Also