I'm trying to implement VBO's into a 2D engine I worte a few years back and I'm not having much luck. I believe I have set the VBO up correctly but I'm getting nothing other than a blank screen. Any Suggestions? Here is the initialisation code for the VBOs

this->m_Pos_Verts_ptr = new class clsVert[this->ml_RenderListLength * 4];
		this->m_Texture_Verts_ptr = new class clsVert[this->ml_RenderListLength * 4];
        
		this->m_LastPos_Verts_ptr = this->m_Pos_Verts_ptr;
		this->m_LastTexture_Verts_ptr = this->m_Texture_Verts_ptr;

		for (iL = this->L.begin();
				iL != this->L.end();
				++ iL)
		{		
			this->m_LastPos_Verts_ptr->mf_X = (*iL)->Get_X();
			this->m_LastPos_Verts_ptr->mf_Y = (*iL)->Get_Y() + (*iL)->Get_Height();

			++ this->m_LastPos_Verts_ptr;

			this->m_LastTexture_Verts_ptr->mf_X = 0.0f;
			this->m_LastTexture_Verts_ptr->mf_Y = 1.0f;

			++ this->m_LastTexture_Verts_ptr;

			this->m_LastPos_Verts_ptr->mf_X = (*iL)->Get_X() + (*iL)->Get_Width();
			this->m_LastPos_Verts_ptr->mf_Y = (*iL)->Get_Y() + (*iL)->Get_Height();

			++ this->m_LastPos_Verts_ptr;

			this->m_LastTexture_Verts_ptr->mf_X = 1.0f;
			this->m_LastTexture_Verts_ptr->mf_Y = 1.0f;

			++ this->m_LastTexture_Verts_ptr;

			this->m_LastPos_Verts_ptr->mf_X = (*iL)->Get_X() + (*iL)->Get_Width();
			this->m_LastPos_Verts_ptr->mf_Y = (*iL)->Get_Y();

			++ this->m_LastPos_Verts_ptr;

			this->m_LastTexture_Verts_ptr->mf_X = 1.0f;
			this->m_LastTexture_Verts_ptr->mf_Y = 0.0f;

			++ this->m_LastTexture_Verts_ptr;

			this->m_LastPos_Verts_ptr->mf_X = (*iL)->Get_X();
			this->m_LastPos_Verts_ptr->mf_Y = (*iL)->Get_Y();

			++ this->m_LastPos_Verts_ptr;

			this->m_LastTexture_Verts_ptr->mf_X = 0.0f;
			this->m_LastTexture_Verts_ptr->mf_Y = 0.0f;

			++ this->m_LastTexture_Verts_ptr;

		}

		//9-5-2007 PH Generate and Bind VBO
		glGenBuffersARB(1, &ml_VBOID);	
		glBindBufferARB(GL_ARRAY_BUFFER_ARB, ml_VBOID);
		
		//10-5-2007 Populate vbo
		glBufferDataARB( GL_ARRAY_BUFFER_ARB, this->ml_RenderListLength * 4 * sizeof(class clsVert), this->m_Pos_Verts_ptr, GL_STATIC_DRAW_ARB);

		// Generate And Bind The Texture Coordinate Buffer
		glGenBuffersARB( 1, &this->ml_Texture_VBOID );					
		glBindBufferARB( GL_ARRAY_BUFFER_ARB, this->ml_Texture_VBOID );		
		// Load The Data
		glBufferDataARB( GL_ARRAY_BUFFER_ARB, ml_RenderListLength * 4 * sizeof(class clsVert), this->m_Texture_Verts_ptr, GL_STATIC_DRAW_ARB );

and the following is the draw routine

	glBindBufferARB( GL_ARRAY_BUFFER_ARB, this->ml_VBOID );
	glVertexPointer( 2, GL_FLOAT, 0, this->m_Pos_Verts_ptr  );		// Set The Vertex Pointer To The Vertex Buffer

	glBindBufferARB( GL_ARRAY_BUFFER_ARB, this->ml_Texture_VBOID );
	glTexCoordPointer( 2, GL_FLOAT, 0, this->m_LastTexture_Verts_ptr );		// Set The TexCoord Pointer To The TexCoord Buffer
	
	glDrawArrays( GL_QUADS, 0, this->ml_RenderListLength * 4 );		// Draw All Of The Triangles 

	//clean up
	glDisableClientState( GL_VERTEX_ARRAY );
	glDisableClientState( GL_TEXTURE_COORD_ARRAY );

This is resolved

I forgot to include glEnableClientState()

and after using
glVertexPointer( 2, GL_FLOAT, 0, (char *) NULL );

it all worked fine