GUI using Windows Forms and Powershell

Windows is responsible for wrapping the text on the button based upon a variety of things including font size, border width, font scaling, etc. You have little control over the actual wrapping. If the button isn't big enough to hold the text then you have to make the button bigger. If you don't want to do that then change the font of the button to be smaller such that it will fit.

If you can provide some repro code then perhaps there might be some options available. It is important that you provide the settings for the form as well because most control properties are inherited from the parent form.

Try this code.

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

public partial class Form1 : Form
{
    const int EM_SETWORDBREAKPROC = 0xD0;
    const int WB_LEFT = 0;
    const int WB_RIGHT = 1;
    const int WB_ISDELIMITER = 2;

    [DllImport("user32")]
    private static extern IntPtr SendMessage(IntPtr hWnd, int msgId, IntPtr wParam, EditWordBreakProc lParam);
    private delegate int EditWordBreakProc(IntPtr ipch, int ichCurrent, int cch, int code);

    private EditWordBreakProc breakProc;

    public Form1() {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e) {
        breakProc = EditWordBreak;
        SendMessage(textBox1.Handle, EM_SETWORDBREAKPROC, IntPtr.Zero, breakProc);
    }

    private int EditWordBreak(IntPtr ipch, int ichCurrent, int cch, int code) {
        switch (code) {
            case WB_ISDELIMITER:
                return 0;
            case WB_LEFT:
                return 0;
            case WB_RIGHT:
                return cch;
        }
        return 0;
    }
}