Oder mit
Declare Function ShellExecute Lib "shell32" Alias "ShellExecuteA" (Byval HWND As Long, Byval mode As String, Byval url As String, Byval a1 As Variant, Byval a2 As Variant, Byval nShowCmd As Integer ) As Long
Dim lg As Long
Call shellexecute(lg,"Open",Pfad zur PDF-Datei,"1","1","1")