Windows 10 display detection API

Win10DetectDisplay.cpp

// cl /EHsc Win10DetectDisplay.cpp

/* This program forces detection of added (or removed) display screens
 * It does the same thing as when clicking on the "Detect" button in Windows display settings
 * This can be used to create a shortcut to refresh displays list
 */

#define UNICODE
#define _UNICODE

#include <windows.h>

/* d3dkmthk.h - BEGIN  */

typedef UINT D3DKMT_HANDLE;  // d3dukmdt.h

typedef struct _D3DKMT_POLLDISPLAYCHILDREN
{
    D3DKMT_HANDLE                   hAdapter;                 // in: Adapter handle
    UINT                            NonDestructiveOnly :  1;  // in: 0x00000001 Destructive or not
    UINT                            SynchronousPolling :  1;  // in: 0x00000002 Synchronous polling or not
    UINT                            DisableModeReset   :  1;  // in: 0x00000004 Disable DMM mode reset on monitor event
    UINT                            PollAllAdapters    :  1;  // in: 0x00000008 Poll all adapters
    UINT                            PollInterruptible  :  1;  // in: 0x00000010 Poll interruptible targets as well.
    UINT                            Reserved           : 27;  // in: 0xffffffc0
} D3DKMT_POLLDISPLAYCHILDREN;

EXTERN_C __checkReturn NTSTATUS APIENTRY D3DKMTPollDisplayChildren(__in CONST D3DKMT_POLLDISPLAYCHILDREN*);

/* d3dkmthk.h - END */

#pragma comment(lib, "gdi32.lib")

int CALLBACK wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmdLine, int nCmdShow) {
  D3DKMT_POLLDISPLAYCHILDREN info;

  SecureZeroMemory(&info, sizeof(info));
  info.hAdapter = (D3DKMT_HANDLE) 0;
  info.SynchronousPolling = 1;
  info.PollAllAdapters    = 1;
  info.PollInterruptible  = 1;

  D3DKMTPollDisplayChildren(&info);

  return 0;
}

Win10DetectDisplay.py

#!/usr/bin/env python

# This script forces detection of added (or removed) display screens
# It does the same thing as when clicking on the "Detect" button in Windows display settings
# This can be used to create a shortcut to refresh displays list

import ctypes

class D3DKMT_POLLDISPLAYCHILDREN(ctypes.Structure):
    _fields_ = [
        ('hAdapter', ctypes.c_uint32),  # (D3DKMT_HANDLE) Adapter handle
        ('NonDestructiveOnly',  ctypes.c_uint32, 1),  # 0x00000001 Destructive or not
        ('SynchronousPolling',  ctypes.c_uint32, 1),  # 0x00000002 Synchronous polling or not
        ('DisableModeReset',    ctypes.c_uint32, 1),  # 0x00000004 Disable DMM mode reset on monitor event
        ('PollAllAdapters',     ctypes.c_uint32, 1),  # 0x00000008 Poll all adapters
        ('PollInterruptible',   ctypes.c_uint32, 1),  # 0x00000010 Poll interruptible targets as well
        ('Reserved',            ctypes.c_uint32, 27)  # 0xffffffc0
    ]

info = D3DKMT_POLLDISPLAYCHILDREN(hAdapter=0,
        SynchronousPolling=1, PollAllAdapters=1, PollInterruptible=1)
ctypes.windll.gdi32.D3DKMTPollDisplayChildren(ctypes.pointer(info))