- 1 year ago
Can I prevent the user of a restricted system from minimizing my application?
Yes, you can prevent the user from minimizing your application window by using the Windows API function SetWindowLongPtr
with the GWL_STYLE
parameter to modify the window style.
Here's an example code snippet in C#:
csharpusing System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
public partial class MainForm : Form
{
private const int GWL_STYLE = -16;
private const long WS_MINIMIZEBOX = 0x00020000L;
private const long WS_SYSMENU = 0x00080000L;
[DllImport("user32.dll", SetLastError = true)]
private static extern IntPtr SetWindowLongPtr(IntPtr hWnd, int nIndex, long dwNewLong);
public MainForm()
{
InitializeComponent();
}
private void MainForm_Load(object sender, EventArgs e)
{
// Disable the minimize button and system menu
long newStyle = GetWindowLongPtr(this.Handle, GWL_STYLE) & ~WS_MINIMIZEBOX & ~WS_SYSMENU;
SetWindowLongPtr(this.Handle, GWL_STYLE, newStyle);
}
}
In this example, we're using the SetWindowLongPtr
function to modify the window style of the form. In the MainForm_Load
event handler, we're removing the WS_MINIMIZEBOX
and WS_SYSMENU
styles from the window style, which disables the minimize button and system menu respectively.
Note that this approach may not work on some restricted systems, as the user may still be able to minimize the application through other means (such as using keyboard shortcuts or using the task manager). Also, disabling the minimize button may not be desirable for all applications, as it may interfere with the user's ability to switch between windows or perform other tasks.