来自:http://forums.arcgis.com/threads/43934-Setting-the-Color-of-a-TextSymbol
public void DrawText( IActiveView view, string text, string fontName, int fontColor, float fontSize, IPoint point ) {
ITextSymbol textSymbol = new TextSymbol();
stdole.IFontDisp font = textSymbol.Font;
font.Name = fontName;
font.Size = (decimal)fontSize;
textSymbol.Font = font;
IColor color = textSymbol.Color;
color.RGB = fontColor;
textSymbol.Color = color;
ITextElement textElement = new TextElementClass();
textElement.Text = text;
textElement.Symbol = textSymbol;
textElement.ScaleText = true;
IElement element = textElement as IElement;
element.Geometry = point;
view.GraphicsContainer.AddElement( element, 0 );
view.PartialRefresh( esriViewDrawPhase.esriViewGraphics, element, null );
}