我试图设置一个小程序来调整当前房间亮度的显示器亮度。GetMonitorBrightness()与访问冲突崩溃
我跟着从MSDN的指示,成立了这一点:
cout << "Legen Sie das Fenster bitte auf den zu steuernden Monitor.\n";
system("PAUSE");
HMONITOR hMon = NULL;
char OldConsoleTitle[1024];
char NewConsoleTitle[1024];
GetConsoleTitle(OldConsoleTitle, 1024);
SetConsoleTitle("CMDWindow7355608");
Sleep(40);
HWND hWnd = FindWindow(NULL, "CMDWindow7355608");
SetConsoleTitle(OldConsoleTitle);
hMon = MonitorFromWindow(hWnd, MONITOR_DEFAULTTOPRIMARY);
DWORD cPhysicalMonitors;
LPPHYSICAL_MONITOR pPhysicalMonitors = NULL;
BOOL bSuccess = GetNumberOfPhysicalMonitorsFromHMONITOR(
hMon,
&cPhysicalMonitors
);
if(bSuccess)
{
pPhysicalMonitors = (LPPHYSICAL_MONITOR)malloc(
cPhysicalMonitors* sizeof(PHYSICAL_MONITOR));
if(pPhysicalMonitors!=NULL)
{
LPDWORD min = NULL, max = NULL, current = NULL;
GetPhysicalMonitorsFromHMONITOR(hMon, cPhysicalMonitors, pPhysicalMonitors);
HANDLE pmh = pPhysicalMonitors[0].hPhysicalMonitor;
if(!GetMonitorBrightness(pmh, min, current, max))
{
cout << "Fehler: " << GetLastError() << endl;
system("PAUSE");
return 0;
}
//cout << "Minimum: " << min << endl << "Aktuell: " << current << endl << "Maximum: " << max << endl;
system("PAUSE");
}
}
但问题:每次我尝试使用GetMonitorBrightness()程序崩溃与Access Violation while writing at Position 0x00000000
(我翻译了德国这个错误)
在尝试调试时,我看到pPhysicalMonitors实际上包含我想要使用的显示器,但pPhysicalMonitors[0].hPhysicalMonitor
仅包含0x0000000。这可能是问题的一部分吗?
非常感谢,DWORD和地址修复了它。 – DoktorMerlin