[SDL] Blitting Problem

[Kevin Macey]

I'm having trouble bliting a surface to the screen
surface. it's telling me I'm passing an incorrect
argument type, But the type is SDL_Rect.

Can anyone offer any suggestions.

[ERROR CODE]
src/window.c: In function `window':
src/window.c:95: error: incompatible type for argument 2 of `SDL_UpperBlit'
src/window.c:95: error: incompatible type for argument 4 of `SDL_UpperBlit'
c:\mingw\bin\mingw32-make: *** [lib/window.o] Error 1


[CODE BELLOW] Copyright Kevin Macey 2006 [CODE BELLOW]

void window(struct container *screen, struct colour colour, SDL_Rect 
area, struct container *content, char name[1000], int shade, int 
titlebar, int border, int close, int iconify, int zoom, int update )
{
	int x,y;
	SDL_Rect title;
	SDL_Rect cbutton;
	SDL_Rect shaded;
	SDL_Rect windowarea;
	struct colour fillcolour;
	struct colour background;

	fillcolour.R=0;
	fillcolour.G=0;
	fillcolour.B=colour.B-150;

	background.R=25;
	background.G=50;
	background.B=75;

	cbutton.x=area.w-25;
	cbutton.y=area.y+5;
	cbutton.w=area.w-5;
	cbutton.h=area.h-5;

	title.x=area.x+4;
	title.y=area.y+4;
	title.w=area.w-1;
	title.h=area.y+30;

	windowarea.x=area.x+5;
	windowarea.y=area.y+35;
	windowarea.w=area.w;
	windowarea.h=area.h;

	shaded.x=area.x;
	shaded.y=area.y;
	shaded.w=area.w-1;
	shaded.h=area.y+31;

	// check if window isnt shaded
	if ( titlebar )
	{

		FillRect(screen, fillcolour, title, 0);
		// draw title bar if there is one
		DrawFrame(screen,colour,title,0,1,0);
				
		title.x=area.x+15;
		title.y=area.y+15;
		title.w=area.w-35;
		title.h=area.x+25;
		
		drawText(screen, colour, title, name, 1,1, 0);
		if ( close )
		{
			cbutton.x=area.w;
			cbutton.y=area.y;
			cbutton.w=area.w;
			cbutton.h=area.y+25;

			//button(screen,colour,cbutton,1,0,0);
		}

		if ( shade )
		{
			if ( border )
				DrawFrame(screen,colour,shaded,0,2,0);
		}else{
			if ( border )
				DrawFrame(screen,colour,area,0,2,0);

			// draw window contents	
			for(y=windowarea.y; y < windowarea.h; y++)
			{
				for(x=windowarea.x; x < windowarea.w; x++)
				{
					DrawPixel(screen,background,x,y,0);

				}

			}

			if( SDL_BlitSurface(content->image, content.area, screen->image, 
windowarea) < 0 )
		     		fprintf(stderr, "BlitSurface error: %s\n", SDL_GetError());

		}
	}
	
	if ( update )
		SDL_UpdateRects(screen->image, 1, &area);

}