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So i found an Answer myself, here it is:
The Name of my Picturebox "Player" is "P1"
Now you create a new Timer that you call "Update" and set the interval to 1.
Now you make a new Sub: Form1 load
in this Sub you write:
Update.Enabled = True
And in our Timer "Update" you write:
P1.Visible = false
P1.visible = True
WARNING: FIRST FALSE THEN TRUE
Its not an Perfect solution but it works as intendet.