if(MouseState.rgbButtons[DIMOUSE_LEFTBUTTON] & 0x80){
POINT ptCursor;
GetCursorPos( &ptCursor );
ScreenToClient( han_Window, &ptCursor );
Matrix projMat;
p_Device->GetTransform(D3DTS_PROJECTION,&projMat);
D3DVIEWPORT9 view;
p_Device->GetViewport( &view );
Vector v;
v.x =  ( ( ( 2.0f * ptCursor.x ) / view.Width  ) - 1 ) / projMat._11;
v.y = -( ( ( 2.0f * ptCursor.y ) / view.Height ) - 1 ) / projMat._22;
v.z =  1.0f;
Matrix viewMat;
D3DXMatrixInverse( &viewMat, NULL, &projMat);
Vector rayOrigin,rayDir;
rayDir.x  = v.x*viewMat._11 + v.y*viewMat._21 + v.z*viewMat._31;
rayDir.y  = v.x*viewMat._12 + v.y*viewMat._22 + v.z*viewMat._32;
rayDir.z  = v.x*viewMat._13 + v.y*viewMat._23 + v.z*viewMat._33;
rayOrigin.x = viewMat._41;
rayOrigin.y = viewMat._42;
rayOrigin.z = viewMat._43;
LPDIRECT3DVERTEXBUFFER9 pVB;
LPDIRECT3DINDEXBUFFER9 pIB;
terrain->Mesh->GetVertexBuffer( &pVB );
terrain->Mesh->GetIndexBuffer( &pIB );
WORD* pIndices;
D3DVERTEX* pVertices;
pIB->Lock( 0, 0, ( void** )&pIndices, 0 );
pVB->Lock( 0, 0, ( void** )&pVertices, 0 );
DWORD dwFace;
FLOAT fBary1, fBary2, fDist;
D3DXIntersect( terrain->Mesh, &rayOrigin, &rayDir, &picked, &dwFace, &fBary1, &fBary2, &fDist, NULL, NULL );
}