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我一直在尝试让我的 DirectX 10 应用程序正确处理全屏的 alt 选项卡。当我从全屏切换选项卡时，应用程序会自动进入窗口模式。

我尝试听 WM_ACTIVATEAPP 手动最小化和最大化程序。它可以工作，但它破坏了程序中已经工作的其他功能（在全屏和窗口之间切换）。从 alt 选项卡恢复后，我第一次尝试退出全屏，黑屏闪烁并保持全屏，第二次触发 WM_ACTIVATEAPP 导致整个程序最小化而不是正确进入窗口模式.

下面是我正在使用的代码：

在 WM_SIZE 上：

mD3D->ResizeBuffers(width, height);
mBufferWidth = width;
mBufferHeight = height;
mViewport.SetViewportRect(0, 0, width, height);
mD3D->GetDevice()->RSSetViewports(1, &mViewport.GetViewport());

在 WM_ACTIVATEAPP 上：

if(wParam == TRUE && mSwapChainDesc.Windowed == FALSE)
{
  // Restore
  ChangeDisplaySettings(NULL, CDS_FULLSCREEN);
  mSwapChain->SetFullscreenState(TRUE, NULL);
  mSwapChainDesc.Windowed = FALSE;
  ResizeBuffers(mBufferWidth, mBufferHeight);
}
else if(wParam == FALSE && mSwapChainDesc.Windowed == FALSE)
{
  // Minimize
  ShowWindow(hwnd, SW_SHOWMINNOACTIVE);
  mSwapChain->SetFullscreenState(FALSE, NULL);
  ChangeDisplaySettings(NULL, 0);
}

在切换窗口模式请求时：

if(mSwapChainDesc.Windowed)
{
  mSwapChain->SetFullscreenState(TRUE, NULL);
  mSwapChainDesc.Windowed = FALSE;
}
else
{
  mSwapChain->SetFullscreenState(FALSE, NULL);
  mSwapChainDesc.Windowed = TRUE;
}
ResizeBuffers(mBufferWidth, mBufferHeight);

调整大小缓冲区：

mDevice->OMSetRenderTargets(0, 0, 0);

// Release all outstanding references to the swap chain's buffers.
mRenderTargetView->Release();

HRESULT hr;
// Preserve the existing buffer count and format.
// Automatically choose the width and height to match the client rect for HWNDs.
hr = mSwapChain->ResizeBuffers(1, width, height, DXGI_FORMAT_UNKNOWN, 0);

// Get buffer and create a render-target-view.
ID3D10Texture2D* pBuffer;
hr = mSwapChain->GetBuffer(0, __uuidof( ID3D10Texture2D), (void**) &pBuffer );

hr = mDevice->CreateRenderTargetView(pBuffer, NULL, &mRenderTargetView);
pBuffer->Release();

mDevice->OMSetRenderTargets(1, &mRenderTargetView, NULL );

// Set up the viewport.
D3D10_VIEWPORT vp;
vp.Width = width;
vp.Height = height;
vp.MinDepth = 0.0f;
vp.MaxDepth = 1.0f;
vp.TopLeftX = 0;
vp.TopLeftY = 0;
mDevice->RSSetViewports( 1, &vp );

如何最小化窗口并仍然保持使用 DirectX 10 在窗口和全屏之间切换的能力？

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