Hi Sebastian,

Unfortunately, PgReadScreen() is not implemented in QNX 4. So you have two option:

1. Use snapshot utility.
2. In case of using Pg.flat* driver you can determine physical framebuffer address, map it in your app and read from it 
according to current graphics mode.

Respectfully,
Oleg

> We need to know the best way to read in a photon region to an image or char 
> array. So we have access to the pixel color data. We are using QNX4.25.
> We want to grab the screen from a process, which will not draw to photon and 
> should just read back what another process have drawn.
> 
> We did not find a suitable function to accomplish that, we just found out that
>  QNX6 has the PgReadScreen function to do this.