Setwindowpos does not show vertical scroll bar in laptop

Question

0.00/5 (No votes)

See more:

I am trying to embed Google Chrome in panel1 using Process.Start funciton in Csharp Winform project.

I come across some weired behavour using SetWindowPos.

The code works perfectly in Windows 8.1 but it works with error in Windows 10.

In windows 10 and laptop, the embedded chrome is covered with some black backround in right and bottom sides.

I tried with some different parameters with hWndInsertAfter and uFlags in SetWindowPos.

However, they do not work.

Does anyone know what causes this black coverage over the embedded process and possible fix for this issue ?

Please have a look at the screenshot uploaded for better understanding of the problem.

SetWindowPos Error Image[^]

Depending on the monitor size, it works sometimes and it does not work sometimes. I need to see the vertical scroll bar from chrome. Black coverage like above is hiding the vertical scroll bar, I guess.

How to see the vertical scroll bar again regardless of the monitor screen size ?

What I have tried:

var rect = new User32.Rect();

foreach (Process proc in procs)
  {
      User32.GetWindowRect(proc.MainWindowHandle, ref rect);
      width = rect.right - rect.left;
      height = rect.bottom - rect.top;

      if (width != 0 && height != 0)
      {
          SetParent(process.MainWindowHandle, panel1.Handle);
          process.StartInfo.WindowStyle = ProcessWindowStyle.Normal;
          SetForegroundWindow(process.MainWindowHandle);
          SetWindowPos(process.MainWindowHandle, 0, 0, 0, panel1.Width, panel1.Height, 0);
          break;
      }
  }

Posted 12-Feb-21 22:26pm

auto9817

Updated 13-Feb-21 6:15am

v4

Add a Solution

Comments

Richard MacCutchan 13-Feb-21 5:37am

It looks like the Width and Height values are not correct. Check with your debugger to see what values they are.

[no name] 13-Feb-21 9:06am

This worked fine for me in W8.1. and also in W10 (.Net FW 4.6.1)

namespace WFACP210213a
{
    public partial class Form1 : Form
    {
        [DllImport("user32.dll", EntryPoint = "SetWindowPos")]
        public static extern IntPtr SetWindowPos(IntPtr hWnd, int hWndInsertAfter, int x, int Y, int cx, int cy, int wFlags);
        [DllImport("user32.dll", SetLastError = true)]
        static extern bool GetWindowRect(IntPtr hwnd, out Rectangle lpRect);
        [DllImport("user32.dll", SetLastError = true)]
        static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);
        [DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        static extern bool SetForegroundWindow(IntPtr hWnd);
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            var procs = Process.GetProcessesByName("chrome");

            foreach (var proc in procs)
            {

                Rectangle rect = new Rectangle();

                GetWindowRect(proc.MainWindowHandle, out rect);
                int width = rect.Right - rect.Left;
                int height = rect.Bottom - rect.Top;

                if (width != 0 && height != 0)
                {
                    SetParent(proc.MainWindowHandle, panel2.Handle);
                    proc.StartInfo.WindowStyle = ProcessWindowStyle.Normal;
                    SetForegroundWindow(proc.MainWindowHandle);
                    SetWindowPos(proc.MainWindowHandle, 0, 0, 0, panel2.Width, panel2.Height, 0);
                    break;
                }
            }
        }
    }
}

auto9817 13-Feb-21 12:02pm

Depending on the monitor size, it works sometimes and it does not work sometimes. I need to see the vertical scroll bar from chrome. Black coverage like above is hiding the vertical scroll bar, I guess.

[no name] 13-Feb-21 12:38pm

What .net FW version?
What monitor size work, and what other do not work?

auto9817 13-Feb-21 12:40pm

Framework 4.52 and in general, it does not work in 15 inches laptop.

[no name] 13-Feb-21 12:45pm

Thank you for your feedback.
Did you try the code I posted above also? Best with at least FW 4.6.1. This to exclude FW side effects

auto9817 13-Feb-21 12:50pm

It is the same as long as I use FW 4.52 or below.

[no name] 13-Feb-21 13:39pm

and what prevents you from to use a FW 4.6 or above?

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)