D3D9 Chams Tutorial

bool Chams;
UINT m_Stride;
LPDIRECT3DTEXTURE9    texGreen;
LPDIRECT3DTEXTURE9    texYellow;

HRESULT GenerateTexture(IDirect3DDevice9 *pD3Ddev, IDirect3DTexture9 **ppD3Dtex, DWORD colour32)
{
	if( FAILED(pD3Ddev->CreateTexture(8, 8, 1, 0, D3DFMT_A4R4G4B4, D3DPOOL_MANAGED, ppD3Dtex, NULL)) )
		return E_FAIL;
	
	WORD colour16 =	((WORD)((colour32>>28)&0xF)<<12)
			|(WORD)(((colour32>>20)&0xF)<<8)
			|(WORD)(((colour32>>12)&0xF)<<4)
			|(WORD)(((colour32>>4)&0xF)<<0);

	D3DLOCKED_RECT d3dlr;    
	(*ppD3Dtex)->LockRect(0, &d3dlr, 0, 0);
	WORD *pDst16 = (WORD*)d3dlr.pBits;

	for(int xy=0; xy < 8*8; xy++)
		*pDst16++ = colour16;

	(*ppD3Dtex)->UnlockRect(0);

	return S_OK;
}

GenerateTexture(m_pD3Ddev, &texYellow,D3DCOLOR_ARGB(255,255,255,0));
GenerateTexture(m_pD3Ddev, &texGreen,D3DCOLOR_ARGB(255,0,255,0));

	if (Chams) 
	{
		if (m_Stride == 44)
		{
             DWORD dwOldZEnable = D3DZB_TRUE;
             m_pD3Ddev->SetTexture(0, texYellow);
             m_pD3Ddev->GetRenderState(D3DRS_ZENABLE, &dwOldZEnable);
             m_pD3Ddev->SetRenderState(D3DRS_ZENABLE, D3DZB_FALSE);
			 m_pD3Ddev->DrawIndexedPrimitive(Type, BaseVertexIndex, MinVertexIndex, NumVertices, startIndex, primCount);
             m_pD3Ddev->SetRenderState(D3DRS_ZENABLE, dwOldZEnable);
             m_pD3Ddev->SetTexture(0, texGreen);
}
	}

if( StreamNumber == 0 ){m_Stride = Stride;}

		if (GetAsyncKeyState(VK_INSERT)&1)
{
	Chams = !Chams;
}