Drag & drop context menu on right‐click

Trigger the context menu

1. Register your app with RegisterDragDrop.
2. In the IDropTarget.Drop method:
   1. Obtain the IShellFolder interface for the drop path.
   2. Get the IDropTarget interface from this folder.
   3. Forward the IDataObject to the DragEnter and Drop methods.
   4. The Drop method will display the correct context menu.

void InvokeDragAndDropRMenu(IDropTarget* pDropTarget, IDataObject* pData, DWORD dwKeys, POINTL point, DWORD* pdwEffect)
{
    ComPtr<IShellFolder> pShellFolder = default;
    ComPtr<IDropTarget> pFolderDropTarget = default;

    hr = GetShellFolder(pszPath, pShellFolder.GetAddressOf());
    hr = pShellFolder.Get()->CreateViewObject(pShellFolder, &IID_IDropTarget, pFolderDropTarget.GetAddressOf());
    hr = pFolderDropTarget.Get()->DragEnter(pFolderDropTarget, pData, PInvoke.MK_RBUTTON, point, pdwEffect);
    hr = pFolderDropTarget.Get()->Drop(pFolderDropTarget, pData, PInvoke.MK_RBUTTON, point, pdwEffect);
}

Mechanism

References

• https://stackoverflow.com/q/78243894/16694806
• https://devblogs.microsoft.com/oldnewthing/20040831-00/?p=38003