CreateCompatibleDC
The CreateCompatibleDC
function creates a memory device context (DC) compatible with the specified
device.
HDC CreateCompatibleDC(
|
HDC hdc |
// handle to memory
device context |
|
); |
|
Parameters
hdc
Identifies
the device context. If this handle is NULL, the function creates a memory
device context compatible with the application s current screen.
Return Values
If the
function succeeds, the return value is the handle to a memory device context.
If the
function fails, the return value is NULL.
Remarks
Before an
application can use a memory device context for drawing operations, it must
select a bitmap of the correct width and height into the device context. Once a
bitmap has been selected, the device context can be used to prepare images that
will be copied to the screen or printed.
The CreateCompatibleDC
function can only be used with devices that support raster operations. An
application can determine whether a device supports these operations by calling
the GetDeviceCaps function.
When you no
longer need the memory device context, call the DeleteDC function to
delete it.
See Also