How to pass HDC within Message?

[brandonhotkey]

How can I send HDC within message?

Code: Select all

SendMessage(HWindow, WM_PRINTCLIENT, HDC, 0);

prints error cannot convert parameter 3 from 'HDC' to 'WPARAM' (C++)

Or I tryied:

Code: Select all

SendMessage(HCapture, WM_COMMAND, 0, HDc);

and recieved error:
C2664: 'SendMessageW' : cannot convert parameter 4 from 'HDC' to 'LPARAM'
There is no context in which this conversion is possible

[HotKeyIt]

SendMessage(HWindow, WM_PRINTCLIENT, (WPARAM)HDC, 0);