int HPEnemy = 100;
		HPEnemy = pEntity->GetHealth();
		char nameBuffer[512];
		sprintf(nameBuffer, "%d", HPEnemy);


		float h = (size.h);
		float offset = (h / 4.f) + 5;
		float w = h / 64.f;
		float health = pEntity->GetHealth();
		UINT hp = h - (UINT)((h * health) / 100);

		int Red = 255 - (health*2.55);
		int Green = health*2.55;

		Render::DrawOutlinedRect((size.x - 6) - 1, size.y - 1, 3, h + 2, Color(0, 0, 0, 180));

		Render::DrawLine((size.x - 6), size.y + hp, (size.x - 6), size.y + h, Color(Red, Green, 0, 180));

		if (health < 100) {

			Render::Text(size.x - 9, size.y + hp, Color(255, 255, 255, 255), Render::Fonts::ESP, nameBuffer);
		}
	}
}

in RenderManager.cpp


void Render::DrawOutlinedRect(int x, int y, int w, int h, Color col)
{
	Interfaces::Surface->DrawSetColor(col);
	Interfaces::Surface->DrawOutlinedRect(x, y, x + w, y + h);
}

void Render::DrawLine(int x0, int y0, int x1, int y1, Color col)
{
	Interfaces::Surface->DrawSetColor(col);
	Interfaces::Surface->DrawLine(x0, y0, x1, y1);
}