Has built a dialog box, in the drawings, the use of modal dialog box that's ok, there is a timer to achieve dynamic curve, using the modal dialog box sometimes point out easy to collapse, now want to change to a modal dialog box, why can appear not defined type

 void Ccurve: : addtaxis (int data, int * path)//data for drawing data frames 
{
//memory mapping 
PWnd1=GetDlgItem (IDC_STATIC_view);//control ID 
PDC1=pWnd1 - & gt; GetDC (); 
PWnd1 - & gt; GetWindowRect (& amp; Rect1);//rc to control the size of the 
W=rect1. Width () - 50; 
H=rect1. Height (); 
M=H/40; 
Bmp1=new Bitmap (W + 50-2 H - 1);//memory bitmap H 

Pen Pen Color (0, 0, 0), (3);//frame bold lines 
Pen spen (Color (0, 0, 0), 1);//border lines 
Gdiplus: : the Font myFont (L "Arial", 8); 
255,0,0,0 SolidBrush brushB (Color ()); 
Graphics Graphics (bmp1); 
HatchBrush newBrush (HatchStyleCross, Color (2555, 255, 255, 255), Color (255, 255, 255255));//white 
Graphics. FillRectangle (& amp; NewBrush, 0, 0, rect1. Width (), H);//to draw area filling white back 
for(int i=0; i<25. I++) 
{
Graphics. DrawLine (& amp; Spen, W * I/24 40, 0, + W * 24 + 40, I/H);//vertical thin lines 
If (I % 4==0) 
Graphics. DrawLine (& amp; Pen, W * I/24 40, 0, + W * 24 + 40, I/H);//longitudinal bold lines 
} 
for(int j=1; j<=400; J++) 
{
If (0==10) (deepth - data + j) %//the position of the integer m 
{
Graphics. DrawLine (& amp; Spen, 40, H * j/400, W + 40, H * j/400);//horizontal lines 
If ((deepth - data + j) % 100==0)//10 m the location of the 
{
Graphics. DrawLine (& amp; Pen, 40, H * j/400, W + 40, H * j/400);//horizontal thick line 
WCHAR buf [160]. 
WsprintfW (buf, L "% d", (deepth - data + j)/10);//note is the figure, the above figures, the following number is small, + 40 is a screen is empty because of the beginning, attach useless 
Graphics. DrawString (buf, 1, & amp; MyFont PointF (0, H * j/400-10), & amp; BrushB);//every 10 meters, add the longitudinal coordinate data 
} 
} 
} 
Addcurve (graphics, pen0, 0, path, data); 
Addcurve (graphics, pen1, 1, path + 1, data); 
Addcurve (graphics, pen2, 2, path + 2, data); 
Addcurve (graphics, pen3 and 3, the path + 3, data); 
Addcurve (graphics, pen4, 4, path + 4, data); 
Addcurve (graphics, pen5, 5, path + 5, data); 
Addcurve (graphics, pen6, 6, path + 6, data); 
Addcurve (graphics, pen7, 7, path + 7, data); 
Addcurve (graphics, pen8, 8, path + 8, data); 
Addcurve (graphics, pen9, 9, path + 9, data); 
Addcurve (graphics, pen10, 10, path + 10, data); 
Addcurve (graphics, pen11, 11, path + 11, data); 
Graphics gr (pDC1 - & gt; M_hDC); 
Gr. DrawImage (bmp1, 1,1,0,0, W + 50, H 2, UnitPixel); 
The ReleaseDC (pDC1);//release DC; 
The delete bmp1; 
Bmp1=NULL; 
}