CF_OWNERDISPLAY Format

A unique clipboard format, CF_OWNERDISPLAY, transfers the burden of displaying the clipboard data to the clipboard owner. Under CF_OWNERDISPLAY, the clipboard owner receives a set of messages that describe client area changes in the clipboard viewer. Table 18.2 shows these messages.

Table 18.2. Owner Display Clipboard Messages
Message Meaning
WM_ASKCBFORMATNAME Sent when the clipboard viewer requests the name of the clipboard format. The clipboard owner must copy wParam bytes into the buffer pointed to by lParam.
WM_PAINTCLIPBOARD Sent when the client area of the clipboard viewer needs repainting. The wParam parameter is the handle of the window of the clipboard viewer. The lParam parameter is a pointer to a PAINTSTRUCT. ...

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