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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Call-a-function-in-a-shared-library/FreeBASIC/call-a-function-in-a-shared-library.basic Normal file
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' FB 1.05.0 Win64
' Attempt to call Beep function in Win32 API
Dim As Any Ptr library = DyLibLoad("kernel32.dll") '' load dll
If library = 0 Then
Print "Unable to load kernel32.dll - calling built in Beep function instead"
Beep : Beep : Beep
Else
Dim beep_ As Function (ByVal As ULong, ByVal As ULong) As Long '' declare function pointer
beep_ = DyLibSymbol(library, "Beep")
If beep_ = 0 Then
Print "Unable to retrieve Beep function from kernel32.dll - calling built in Beep function instead"
Beep : Beep : Beep
Else
For i As Integer = 1 To 3 : beep_(1000, 250) : Next
End If
DyLibFree(library) '' unload library
End If
Print
Print "Press any key to quit"
Sleep