监测多模式笔记本的模式切换

监测多模式笔记本的模式切换

现在笔记本越来越多，可分离式，可以折叠成平板式的。。

但是有的是我我们想监听模式切换的event 要怎么做呢？

一种比较简单的方式就是：WM_SETTINGCHANGE message

Remarks

The lParam parameter indicates which system metric has changed, for example, "ConvertibleSlateMode" if the CONVERTIBLESLATEMODE indicator was toggled or "SystemDockMode" if the DOCKED indicator was toggled.

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int wmId, wmEvent;
PAINTSTRUCT ps;
HDC hdc;

switch (message)
{
case WM_COMMAND:
wmId    = LOWORD(wParam);
wmEvent = HIWORD(wParam);
// Parse the menu selections:
switch (wmId)
{
case IDM_ABOUT:
DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
break;
case IDM_EXIT:
DestroyWindow(hWnd);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
break;
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
// TODO: Add any drawing code here...
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
case WM_SETTINGCHANGE:
OnSettingsChange(wParam, lParam);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}

void OnSettingsChange(WPARAM wParam, LPARAM lParam)
{
if (lParam == NULL)
{
return;
}
OutputDebugString(LPTSTR(lParam));
wstring sType = LPTSTR(lParam);
if (sType == _T("ConvertibleSlateMode");)
{
switch (wParam)
{
case 0:
OutputDebugString(_T("tablet mode"));
break;
case 1:
OutputDebugString(_T("Normal mode"));
break;
default:
break;
}

}

}

但是使用这种方法的前提是笔记本的设计要符合微软的规范：
微软设计规范

参考文献