C# Signature:
[DllImport("user32.dll")]
static extern int DrawText(IntPtr hDC, string lpString, int nCount, ref RECT lpRect, uint uFormat);
User-Defined Types:
private struct Rect
{
public int Left, Top, Right, Bottom;
public Rect(Rectangle r)
{
this.Left = r.Left;
this.Top = r.Top;
this.Bottom = r.Bottom;
this.Right = r.Right;
}
}
Notes:
None.
Tips & Tricks:
private const int DT_TOP = 0x00000000;
private const int DT_LEFT = 0x00000000;
private const int DT_CENTER = 0x00000001;
private const int DT_RIGHT = 0x00000002;
private const int DT_VCENTER = 0x00000004;
private const int DT_BOTTOM = 0x00000008;
private const int DT_WORDBREAK = 0x00000010;
private const int DT_SINGLELINE = 0x00000020;
private const int DT_EXPANDTABS = 0x00000040;
private const int DT_TABSTOP = 0x00000080;
private const int DT_NOCLIP = 0x00000100;
private const int DT_EXTERNALLEADING = 0x00000200;
private const int DT_CALCRECT = 0x00000400;
private const int DT_NOPREFIX = 0x00000800;
private const int DT_INTERNAL = 0x00001000;
Sample Code:
[DllImport("user32.dll", CharSet=CharSet.Unicode)]
static extern int DrawText(IntPtr hdc, string lpStr, int nCount,ref Rect lpRect, int wFormat);
[DllImport("gdi32.dll")]
static extern int SetTextColor(IntPtr hdc, int crColor);
[DllImport("gdi32.dll")]
static extern int SetBkColor(IntPtr hdc, int crColor);
private const int DT_CENTER = 0x1;
private const int DT_VCENTER = 0x4;
private const int DT_SINGLELINE = 0x20;
private struct Rect
{
public int Left, Top, Right, Bottom;
public Rect(Rectangle r)
{
this.Left = r.Left;
this.Top = r.Top;
this.Bottom = r.Bottom;
this.Right = r.Right;
}
}
private void tabControl1_DrawItem(object sender, DrawItemEventArgs e)
{
e.DrawBackground();
TabPage tabPage = this.TabPages[e.Index] as TabPage;
using (Brush backcolorBrush = new SolidBrush(Color.Pink))
{
e.Graphics.FillRectangle(backcolorBrush, e.Bounds);
Rect bounds = new Rect(e.Bounds);
IntPtr hdc = e.Graphics.GetHdc();
SetTextColor(hdc, ColorTranslator.ToWin32(Color.SteelBlue));
SetBkColor(hdc, ColorTranslator.ToWin32(Color.LemonChiffon));
int flags = DT_CENTER | DT_VCENTER | DT_SINGLELINE;
DrawText(hdc, tabPage.Text, tabPage.Text.Length, ref bounds, flags);
e.Graphics.ReleaseHdc(hdc);
}
e.DrawFocusRectangle();
}
Alternative Managed API:
System.Drawing.Graphics.DrawString
