Sure:

long mem = ((LPDIRECT3DDEVICE9)pd3ddev)->GetAvailableTextureMem();
printf("Memory at start: %i",mem);
...
long mem_used = mem - ((LPDIRECT3DDEVICE9)pd3ddev)->GetAvailableTextureMem();
printf("Memory used: %i",mem_used);

GetAvailableTextureMem() is the same as d3d_texfree.