'================================================================
'= システムの短い日付形式を変更
'=    (SetLocaleInfo.bas)
'================================================================
#include "Windows.bi"

#define LOCALE_SSHORTDATE &H1F          '短い形式
#define WM_SETTINGCHANGE &H1A           '変更を通知
#define HWND_BROADCAST &HFFFF           'トップレベルウィンドウ に対してメッセージを送る

Type SYSTEMTIME
    wYear         As Integer
    wMonth        As Integer
    wDayOfWeek    As Integer
    wDay          As Integer
    wHour         As Integer
    wMinute       As Integer
    wSecond       As Integer
    wMilliseconds As Integer
End Type

' 日付表示の書式を取得
Declare Function Api_GetDateFormat& Lib "Kernel32" Alias "GetDateFormatA" (ByVal Locale&, ByVal dwFlags&, lpDate As SYSTEMTIME, ByVal lpFormat$, ByVal lpDateStr$, ByVal cchDate&)

' 時刻をフォーマットし、指定された地域に対応する時刻文字列を作成
Declare Function Api_GetTimeFormat& Lib "kernel32" Alias "GetTimeFormatA" (ByVal Locale&, ByVal dwFlags&, lpTime As SYSTEMTIME, ByVal lpFormat As Any, ByVal lpTimeStr$, ByVal cchTime&)

' 地域情報を設定
Declare Function Api_SetLocaleInfo& Lib "kernel32" Alias "SetLocaleInfoA" (ByVal Locale&, ByVal LCType&, ByVal lpLCData$)

' スレッドに関連付けられているメッセージキューにメッセージをポストする
Declare Function Api_PostMessage& Lib "user32" Alias "PostMessageA" (ByVal hWnd&, ByVal wMsg&, ByVal wParam&, ByVal lParam&)

' システムの既定ロケール識別子を取得
Declare Function Api_GetSystemDefaultLCID& Lib "kernel32" Alias "GetSystemDefaultLCID" ()

Var Shared Text(1) As Object
Var Shared Button(1) As Object
Var Shared Timer1 As Object

For i = 0 To 1
    Text(i).Attach GetDlgItem("Text" & Trim$(Str$(i + 1))) : Text(i).SetFontSize 14
    Button(i).Attach GetDlgItem("Button" & Trim$(Str$(i + 1))) : Button(i).SetFontSize 14
Next
Timer1.Attach GetDlgItem("Timer1")

'================================================================
'=
'================================================================
Declare Sub MainForm_Start edecl ()
Sub MainForm_Start()
    Timer1.SetInterval 100
    Timer1.Enable -1
End Sub

'================================================================
'=
'================================================================
Declare Sub Timer1_Timer edecl ()
Sub Timer1_Timer()
    Var Buffer As String
    Var st As SYSTEMTIME
    Var Ret As Long

    st.wDay = Val(Right$(Today$, 2))
    st.wMonth = Val(Mid$(Today$, 6, 2))
    st.wYear = Val(Left$(Today$, 4))

    st.wHour = Val(Left$(Time$, 2))
    st.wMinute = Val(Mid$(Time$, 4, 2))
    st.wSecond = Val(Right$(Time$, 2))

    Buffer = String$(255, 0)
    Ret = Api_GetDateFormat(ByVal 0, 0, st, ByVal 0, Buffer, Len(Buffer))
    Buffer = Left$(Buffer, InStr(1, Buffer, Chr$(0)) - 1)
    Text(0).SetWindowText Buffer

    Buffer = String$(255, 0)
    Ret = Api_GetTimeFormat(ByVal 0, 0, st, ByVal 0, Buffer, Len(Buffer))
    Buffer = Left$(Buffer, InStr(1, Buffer, Chr$(0)) - 1)
    Text(1).SetWindowText Buffer
End Sub

'================================================================
'= dd-MMM-yy
'================================================================
Declare Sub Button1_on edecl ()
Sub Button1_on()
    Var dwLCID As Long
    Var Ret As Long

    dwLCID = Api_GetSystemDefaultLCID()
    If Api_SetLocaleInfo(dwLCID, LOCALE_SSHORTDATE, "dd-MMM-yy") = False Then
       A% = MessageBox("", "Failed", 0, 2)
       Exit Sub
    End If

    Ret = Api_PostMessage(HWND_BROADCAST, WM_SETTINGCHANGE, 0, 0)
End Sub

'================================================================
'= yyyy/MMM/dd
'================================================================
Declare Sub Button2_on edecl ()
Sub Button2_on()
    Var dwLCID As Long
    Var Ret As Long

    dwLCID = Api_GetSystemDefaultLCID()
    If Api_SetLocaleInfo(dwLCID, LOCALE_SSHORTDATE, "yyyy/MMM/dd") = False Then
       A% = MessageBox("", "Failed", 0, 2)
       Exit Sub
    End If

    Ret = Api_PostMessage(HWND_BROADCAST, WM_SETTINGCHANGE, 0, 0)
End Sub

'================================================================
'=
'================================================================
While 1
    WaitEvent
Wend
Stop
End