ID Number: Q31668
2.x 3.00
WINDOWS
Summary:
The clipboard sends a WM_RENDERFORMAT message to an application to
request that application format the data last copied to the clipboard
in the specified format, and then pass a handle to the formatted data
to the clipboard.
If an application cannot supply the requested data, it should return a
NULL handle. Because most applications provide access to the actual
data (not rendered) through the CF_TEXT format, applications that use
the clipboard can get the applicable data when rendering fails.
If the application cannot render the data because the system is out of
memory, the application can call GlobalCompact(-1) to discard and
compress memory, then try the memory allocation request again.
If this fails to provide enough memory, the application can render the
data into a file. However, applications that use this technique must
cooperate in order to know that the information is in a file, the name
of the file, and the format of the data.