Listview set thumbnails size!

You can quickly set the size of the thumbnails in the list view, and there are no restrictions on the size!!

// This function creates a new Imagelist
// and associates it with a Listview control (m_hWnd).
 
HIMAGELIST CreateNewImageList(HWND m_hWnd, int cx, int cy) {
 // Set flags for configuring the Imagelist.
 UINT uFlags = ILC_COLOR32 | ILC_MASK;
 // Number of images in the Imagelist.
 int cImages = 1;
 
 // Create the Imagelist with
// the specified width (cx) and height (cy) for the images.
 HIMAGELIST m_hImageList = ImageList_Create(cx, cy, uFlags, cImages, 1);
 
 // Associate the created Imagelist
 // with the Listview control (m_hWnd).
 // The constant LVM_SETIMAGELIST
 // is used to establish the linkage.
 SendMessage(m_hWnd, LVM_SETIMAGELIST, 0, (LPARAM)m_hImageList);
 
 // Return the created Imagelist.
 return m_hImageList;
}
 
LRESULT CALLBACK
WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
 
    switch (uMsg)
    {
   case WM_CREATE:
   // Create the Listview control.
   HWND listViewHandle =
     CreateWindowEx(0, WC_LISTVIEW, L"",
    WS_VISIBLE | WS_CHILD | LVS_ICON,
        0, 0, 200, 200,
        hWnd, NULL, GetModuleHandle(NULL), NULL);
 
   // Call the CreateNewImageList function to create an Imagelist
   // and associate it with the Listview control.
   HIMAGELIST imageList = CreateNewImageList(listViewHandle, 16, 16);
 
   if (imageList != NULL) {
    // Here, you can use the
    // created Imagelist to add and display images.
    // After you finish working with//
    // the Imagelist, you should release it
    // to avoid memory leaks.
    // This is not fully implemented in this example.
 
    // An example of adding images:
    // ImageList_Add(imageList, hBitmap, NULL);
   }
   break;
 
  case WM_DESTROY:
   PostQuitMessage(0);
   return 0;
 
  default:
   return DefWindowProc(hWnd, uMsg, wParam, lParam);
 }
 return 0;
}
 
int WINAPI
WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
        LPSTR lpCmdLine, int nCmdShow)
{
 
 
WNDCLASS wc = { 0 };
 wc.lpfnWndProc = WindowProc;
 wc.hInstance = hInstance;
 wc.lpszClassName = L"MyWindowClass";
 
 if (!RegisterClass(&wc))return -1;
 
 HWND hWnd =
 CreateWindow(L"MyWindowClass", L"My Window", WS_OVERLAPPEDWINDOW,
 100, 100, 400, 400, NULL, NULL,
 hInstance, NULL);
 
 if (!hWnd) {
  return -1;
 }
 
 ShowWindow(hWnd, nCmdShow);
 
 MSG msg = { 0 };
 while (GetMessage(&msg, NULL, 0, 0))
 {
  TranslateMessage(&msg);
  DispatchMessage(&msg);
 }
 
 return 0;
}

(Image-1) Listview set thumbnails size!

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