win32 capCreateCaptureWindow problem

[Ivan Boritsky]

i work on a win32 application. i try to access my web camera.
when i use this api funtion;
capCreateCaptureWindow("cam", WS_VISIBLE + WS_CHILD, 10, 10,266, 252, hWnd, 0);

i get this error:
Error: undefined identifier capCreateCaptureWindow

my compile comman is:
dmd webcam.d gdi32.lib advapi32.lib

what am i doing wrong? how can i acces my web cam?