Peter Murphy's stunning goal sealed a 1-0 win in Wanderers' final pre-season friendly.
The former Accrington man opened his Wycombe account with a bang, finding the top corner with a sublime effort from distance midway through the second half.
The Bees fielded former Wanderers loanees Sam Togwell and John Akinde in their starting line-up, and should have taken the lead when Bondz N’Gala glanced a free header wide of the far post after just five minutes.
Paul Hayes had the visitors’ first chance, bringing the ball down neatly 20 yards out before attempting a lob which keeper Graham Stack did well to tip behind.
From the resulting corner, Sam Wood whipped a dangerous cross to the back post where Aaron Pierre should have done better than send his header over the bar.
Pierre was the recipient of another excellent delivery on 13 minutes, this time from debutant Nicky Walker, but the centre-back was unable to turn his effort goalwards under pressure from his marker.
Akinde missed a glorious chance to open the scoring on 17 minutes when the referee waved play on despite an apparent foul in the centre, but the striker chipped his effort past the post with only the keeper the beat.
The chances began to dry up before the break, although the hosts will probably feel happier about the openings they created with some impressive build-up play which lacked an end product.
Paul Hayes came a whisker away from notching his first goal of pre-season with a stunning effort from 25 yards, but the ball flew just over the bar with keeper Graham Stack beaten.
There was cause for concern just before the hour-mark when Josh Scowen had to be carried off on a stretcher after sustaining an injury, with Max Kreztschmar taking his place.
Barnet thought they’d taken the lead on 66 minutes when Charlie MacDonald tapped home but referee Kinsley had already blown for a foul after Gary Doherty brought down Akinde 25 yards out, and Mauro Vilhete’s free-kick cleared the stand behind the goal, let alone the crossbar.
And they were made to pay moments later when Peter Murphy’s brilliant effort found the top corner from well over 30 yards. Keeper Stack miscontrolled a backpass and cleared as far as Kretzschmar, who teed up Murphy to strike first-time into the net with effortless and nonchalant style.
Blues were indebted to a fine interception by Danny Rowe on 78 minutes to prevent MacDonald bearing down on goal, before Murphy went close with another piledriver from 25 yards two minutes later.
The home side were unable to find a way back and Gareth Ainsworth's men can be pleased with back-to-back friendly victories ahead of the big league curtain-raiser at Newport next week.
Wycombe: Ingram, Jombati, Jacobson, Doherty (Rowe 71), Pierre, Walker (Cowan-Hall 45), Scowen (Kretzschmar 60), Murphy (Bloomfield 81), Wood, Hayes (Craig 77), McClure (Holloway 64).
Subs: Richardson, Morias.
Barnet: Stack, Vilhete, Johnson, N’Gala, Stephens, Marsh-Brown (Gambin 57), Weston, Togwell (Villa 90), Trialist (Muggleton 57), Akinde, MacDonald.
Subs: Cowler, Saville, Nurse, Lowe, Sykes.