windows-server-2003/windows/core/ntuser/client/mmcl.c

/****************************** Module Header ******************************\
* Module Name: mmcl.c
*
* Copyright (c) 1985 - 1999, Microsoft Corporation
* 
* Multimonitor APIs in the client.
* 
* History:
* 29-Mar-1997 adams     Created.
\***************************************************************************/

#include "precomp.h"
#pragma hdrstop

HMONITOR
MonitorFromPoint(
    IN POINT pt,
    IN DWORD dwFlags)
{
    PMONITOR    pMonitor;

    if (dwFlags > MONITOR_DEFAULTTONEAREST) {
        RIPERR1(ERROR_INVALID_FLAGS,
                RIP_WARNING,
                "Invalid flags to MonitorFromPoint, %x", dwFlags);

        return NULL;
    }

    pMonitor = _MonitorFromPoint(pt, dwFlags);

    try {
        return PtoH(pMonitor);
    } except(W32ExceptionHandler(TRUE, RIP_WARNING)) {
        return NULL;
    }
}



HMONITOR
MonitorFromRect(
    IN LPCRECT lprc,
    IN DWORD dwFlags)
{
    PMONITOR    pMonitor;

    if (dwFlags > MONITOR_DEFAULTTONEAREST) {
        RIPERR1(ERROR_INVALID_FLAGS,
                RIP_WARNING,
                "Invalid flags to MonitorFromRect, %x", dwFlags);

        return NULL;
    }

    pMonitor = _MonitorFromRect(lprc, dwFlags);

    try {
        return PtoH(pMonitor);
    } except(W32ExceptionHandler(TRUE, RIP_WARNING)) {
        return NULL;
    }
}



HMONITOR
MonitorFromWindow(
    IN HWND hwnd,
    IN DWORD dwFlags)
{
    PMONITOR    pMonitor;
    PWND        pwnd;

    if (dwFlags > MONITOR_DEFAULTTONEAREST) {
        RIPERR1(ERROR_INVALID_FLAGS,
                RIP_WARNING,
                "Invalid flags to MonitorFromWindow, %x", dwFlags);

        return NULL;
    }

    if (hwnd) {
        pwnd = ValidateHwnd(hwnd);
        if (!pwnd) {
            return NULL;
        }
    } else {
        pwnd = NULL;
    }

    pMonitor = _MonitorFromWindow(pwnd, dwFlags);

    try {
        return PtoH(pMonitor);
    } except(W32ExceptionHandler(TRUE, RIP_WARNING)) {
        return NULL;
    }
}