ICDrawSetTime macro (vfw.h)

Article
10/05/2021

The ICDrawSetTime macro provides synchronization information to a rendering driver that handles the timing of drawing frames. The synchronization information is the sample number of the frame to draw. You can use this macro or explicitly call the ICM_DRAW_SETTIME message.

Syntax

void ICDrawSetTime(
   hic,
   lTime
);

Parameters

hic

Handle to a driver.

lTime

Sample number of the frame to render.

Return value

None

Remarks

Typically, the driver compares the specified value with the frame number associated with the time of its internal clock and attempts to synchronize the two if the difference is significant.

Use this message when the hardware performs its own asynchronous decompression, timing, and drawing, and the hardware relies on an external synchronization signal (the hardware is not being used as the synchronization master).

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	vfw.h