How do I call an external function? I tried this code but it always crashes:
Private Declare Function FreeLibrary Lib "kernel32" (ByVal hLibModule As Long) As Long
Private Declare Function LoadLibrary Lib "kernel32" Alias "LoadLibraryA" (ByVal lpLibFileName As String) As Long
Private Declare Function GetProcAddress Lib "kernel32" (ByVal hModule As Long, ByVal lpProcName As String) As Long
Private Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, ByVal hWnd As Long, ByVal Msg As Any, ByVal wParam As Any, ByVal lParam As Any) As Long
Private Sub Form_Load()
On Error Resume Next
Dim lb As Long, pa As Long
lb = LoadLibrary("zlib.dll")
pa = GetProcAddress(lb, "compress")
CallWindowProc pa, Me.hWnd, "Hello !", ByVal 0&, ByVal 0&
FreeLibrary lb
End Sub
