DFBCHECK(font->GetStringWidth(font,msg1_txt,-1,&str_width));
DFBCHECK(primary->DrawString(primary,msg1_txt,-1,(screen_width-str_width)/2,(screen_height/2)+3*font_dsc.height,DSTF_LEFT));
DFBCHECK(primary->Flip(primary,NULL,DSFLIP_WAITFORSYNC));
DFBCHECK(font->GetStringWidth(font,msg1_txt,-1,&str_width));
DFBCHECK(primary->DrawString(primary,msg1_txt,-1,(screen_width-str_width)/2,(screen_height/2)+3*font_dsc.height,DSTF_LEFT));
DFBCHECK(primary->Flip(primary,NULL,DSFLIP_WAITFORSYNC));