GetAsyncKeyState / code à tester svp

Bonjour,

A propos de GetAsyncKeyState, j'ai trouvé un exemple sur le net qui
fonctionne très bien, sauf quand dans

Sub TimerProc(....

je rajoute

if ret ="z" then msgbox "hello"

VB6 plante à l'exécution et disparaît instantanément sans aucun message
d'erreur!

Si quelqu'un a une explication, merci.



http://www.ex-designz.net/apidetail.asp?api_id=419


'In a module
Public Const DT_CENTER = &H1
Public Const DT_WORDBREAK = &H10

Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type

Declare Function DrawTextEx Lib "user32" Alias "DrawTextExA" (ByVal hDC
As Long, ByVal lpsz As String, ByVal n As Long, lpRect As RECT, ByVal
un As Long, ByVal lpDrawTextParams As Any) As Long
Declare Function SetTimer Lib "user32" (ByVal hwnd As Long, ByVal
nIDEvent As Long, ByVal uElapse As Long, ByVal lpTimerFunc As Long) As
Long
Declare Function KillTimer Lib "user32" (ByVal hwnd As Long, ByVal
nIDEvent As Long) As Long
Declare Function GetAsyncKeyState Lib "user32" (ByVal vKey As Long) As
Integer
Declare Function SetRect Lib "user32" (lpRect As RECT, ByVal X1 As
Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long) As Long

Global Cnt As Long, sSave As String, sOld As String, Ret As String
Dim Tel As Long

Function GetPressedKey() As String
For Cnt = 32 To 128
'Get the keystate of a specified key
If GetAsyncKeyState(Cnt) <> 0 Then
GetPressedKey = Chr$(Cnt)
Exit For
End If
Next Cnt
End Function

Sub TimerProc(ByVal hwnd As Long, ByVal nIDEvent As Long, ByVal uElapse
As Long, ByVal lpTimerFunc As Long)
Ret = GetPressedKey
If Ret <> sOld Then
sOld = Ret
sSave = sSave + sOld
End If
End Sub

'In a form
Private Sub Form_Load()
Me.Caption = "Key Spy"
'Create an API-timer
SetTimer Me.hwnd, 0, 1, AddressOf TimerProc
End Sub

Private Sub Form_Paint()
Dim R As RECT
Const mStr = "Start this project, go to another application, type
something, switch back to this application and unload the form. If you
unload the form, a messagebox with all the typed keys will be shown."
'Clear the form
Me.Cls
'API uses pixels
Me.ScaleMode = vbPixels
'Set the rectangle's values
SetRect R, 0, 0, Me.ScaleWidth, Me.ScaleHeight
'Draw the text on the form
DrawTextEx Me.hDC, mStr, Len(mStr), R, DT_WORDBREAK Or DT_CENTER, ByVal
0&
End Sub

Private Sub Form_Resize()
Form_Paint
End Sub

Private Sub Form_Unload(Cancel As Integer)
'Kill our API-timer
KillTimer Me.hwnd, 0
'Show all the typed keys
MsgBox sSave
End Sub