MAYBE IT'S LIKE WEBVIEW2，OR QT EXE??

web control hwnd:Intermediate D3D Window
exe classname:Chrome_WidgetWin_1

Process path:
"abc.exe" --type=gpu-process --user-data-dir="C:\Users\admin\AppData\app1" --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEgA AAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAA AAAACAAAAAAAAAA= --mojo-platform-channel-handle=1700 --field-trial-handle=1784,i,17425394976030928647,15251993890451894824,131072 --disable-features=SpareRendererForSitePerProcess,WinRetrieveSuggestionsOnlyOnDemand /prefetch:2

SEND MESSAGE WM_DROPFILES，No drag-and-drop file event was generated on the web page

Code:
szFileName = StrConv(File1, vbFromUnicode)
 Call GetWindowThreadProcessId(HWND, dwPid)
        hProc = OpenProcess(&H8& + &H20&, False, dwPid)
        If hProc Then
            pmem = VirtualAllocEx(hProc, 0&, dwBuffSize, MEM_COMMIT, PAGE_READWRITE)
            If pmem Then
                Debug.Print pmem
                If WriteProcessMemory(hProc, pmem, pBuff(0), dwBuffSize, 0&) Then
                    'Call SendMessage(hWnd, WM_DROPFILES, pmem, ByVal 0&)
                    Call PostMessage(HWND, WM_DROPFILES, pmem, ByVal 0&)