How can I create 2 virtual displays?

[cuikeqiang]

I called the function below twice, but only can create one virtual display, the second time it returned "SwDeviceCreate failed with 0x800700b7". Anyone knows how to create second virtual display?
HRESULT hr = SwDeviceCreate(L"IddSampleDriver",
L"HTREE\ROOT\0",
&createInfo,
0,
nullptr,
CreationCallback,
&hEvent,
&hSwDevice);

[apexiptv]

I was wondering same... says it works with 5 virtual

[cuikeqiang]

I was wondering same... says it works with 5 virtual

@apexiptv Try Microsoft's example: https://github.com/microsoft/Windows-driver-samples/blob/main/video/IndirectDisplay/IddSampleDriver/Driver.cpp

It will create 3 displays with different size.

You need to set this one to 3:
static constexpr DWORD IDD_SAMPLE_MONITOR_COUNT = 3; // If monitor count > ARRAYSIZE(s_SampleMonitors), we create edid-less monitors

[ge9]

or you can use my fork , which is also mentioned in README.md in this repo.