Syntax
INT is_GetDC (HIDS hf, HDC* phDC)
Description
is_GetDC() returns the overlay buffer’s device context handle. Using this handle Windows GDI functions can access the overlay. All graphics commands such as line, circle, rectangle and text out from Windows are available. The device context handle must be released as soon as possible with the is_ReleaseDC() function. Within the GetDC - ReleaseDC blocks there are no updates of the overlay buffer on the display.
Parameters
hf |
Frame grabber handle |
phDC |
Pointer to the variable, which the device handle takes over |
Return value
IS_SUCCESS, IS_NO_SUCCESS
