c# 字体安装

     [DllImport("kernel32.dll", SetLastError = true)]
        static extern int WriteProfileString(string lpszSection, string lpszKeyName, string lpszString);

        [DllImport("user32.dll")]
        public static extern int SendMessage(int hWnd, // handle to destination window
        uint Msg, // message
        int wParam, // first message parameter
        int lParam // second message parameter
        );

        [DllImport("gdi32")]
        public static extern int AddFontResource(string lpFileName);

         private void installFont()
        {

        string WinFontDir = System.Environment.GetEnvironmentVariable("windir") + "\\fonts";
        string FontFileName = "方正北魏楷书简体.TTF";
        string FontName = "方正北魏楷书简体";
            int Ret;
            int Res;
            string FontPath;
            const int WM_FONTCHANGE = 0x001D;
            const int HWND_BROADCAST = 0xffff;
            FontPath = WinFontDir + "\\" + FontFileName;
            if (!File.Exists(FontPath))
            {
                File.Copy(System.Windows.Forms.Application.StartupPath + "\\方正北魏楷书简体.ttf", FontPath);
                Ret = AddFontResource(FontPath);

                Res = SendMessage(HWND_BROADCAST, WM_FONTCHANGE, , );
                Ret = WriteProfileString("fonts", FontName + "(TrueType)", FontFileName);
            }

        }