in D3D9 it's called SetDialogBoxMode. But it's has some restrictions:
If the method succeeds, the return value is D3D_OK. If the method fails, the return value can be D3DERR_INVALIDCALL unless all of the following are true.
- The application specified a back buffer format compatible with GDI, in other words, one of D3DFMT_X1R5G5B5, D3DFMT_R5G6B5, or D3DFMT_X8R8G8B8.
The application specified no multisampling.
The application specified D3DSWAPEFFECT_DISCARD.
The application specified D3DPRESENTFLAG_LOCKABLE_BACKBUFFER.
The application did not specify D3DCREATE_ADAPTERGROUP_DEVICE.
The application is not between BeginScene and EndScene.
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