为什么vb6.0中两个一模一样的代码，一个可以用另一个却用不了！该怎么解决

为什么vb6.0中两个一模一样的代码，一个可以用另一个却用不了！！！
窗口闪动代码如下：（两个代码在同一程序同一计时器中测试的）

1.（此代码可用）
Private Declare Function FlashWindow Lib "user32" (ByVal hwnd As Long, ByVal bInvert As Long) As Long

Private Sub Timer1_Timer()
FlashWindow Me.hwnd, True
End Sub


2.（此代码不可用）
Private Declare Function FlashWindow Lib "user32" (ByVal hwnd As Long, ByVal bInvert As Long) As Long

Private Sub Timer1_Timer()
FlashWindow Me.hwnd, Ture
End Sub


------解决方案--------------------
1.（此代码可用）
Private Declare Function FlashWindow Lib "user32" (ByVal hwnd As Long, ByVal bInvert As Long) As Long

Private Sub Timer1_Timer()
FlashWindow Me.hwnd, True
End Sub


2.（此代码不可用）
Private Declare Function FlashWindow Lib "user32" (ByVal hwnd As Long, ByVal bInvert As Long) As Long

Private Sub Timer1_Timer()
FlashWindow Me.hwnd, Ture '拼写错误
End Sub

------解决方案--------------------
不是不可用
Private Declare Function FlashWindow Lib "user32" (ByVal hwnd As Long, ByVal bInvert As Long) As Long

需要放在全局声明部分要置顶的