Thread: ejecting multiple cd-rom drives

Code:

#include <windows.h>
#include <stdio.h>
#include <tchar.h>

#if defined(_MSC_VER)
#  pragma comment(lib, "winmm.lib")
#endif

void EjectAll(void)
{
	TCHAR command[1000];
	TCHAR result[1000];
	UINT  count;
	UINT  i;

	/* Get the number of cdaudio devices available. */
	mciSendString(TEXT("sysinfo cdaudio quantity"), result, 1000, NULL);
	count = _tcstoul(result, NULL, 10);

	for (i = 1; i <= count; i++)
	{
		/* Get the name of this device. */
		wsprintf(command, TEXT("sysinfo cdaudio name %u"), i);
		mciSendString(command, result, 1000, NULL);

		/* Open this device. */
		wsprintf(command, TEXT("open %.500s alias cd1"), result);
		mciSendString(command, NULL, 0, NULL);

		/* Eject this device. */
		mciSendString(TEXT("set cd1 door open wait"), NULL, 0, NULL);

		/* Close this device. */
		mciSendString(TEXT("close cd1"), NULL, 0, NULL);
	}
}

int main(void)
{
	EjectAll();
	getchar();
	return 0;
}