決まり文句
この記事で紹介しているのはネットゲームのウルティマオンラインのツール開発に関する内容ですが、ウィンドウメッセージを送ったり受け取ったりしたことの無い方には、VBでアプリケーション間通信の手助けとなるコードが書かれてるかもしれません。
途中からこの記事を見た方は、こちらから全て見ることができます。
基本な流れ
１．ＵＯＡに情報ちょうだいとお願いする（UOAにログイン）
↓
２．ＵＯＡにｘｘｘを教えてとお願いする
その場で値が戻ってくるのもあるし、
非同期でウィンドウに通知してくるものもある。
↓
３．ＵＯＡに情報はもう要らないですとお願いする（UOAからログアウト）
※ＵＯＡのログイン数に制限があるので必ずログアウトはした方がいいです。
デバック時にログインできなくなってしまったらＵＯＡ再起動という感じになります。
最低限必要なもの
FindWindow - ログインするときにUOAを見つけるのに必要
SendMessage - UOAにメッセージを送るのに必要
GlobalGetAtomName,GlobalDeleteAtom - UOAから文字列を受け取るときに必要
ウィンドウプロシージャー - 非同期で戻ってくるメッセージを受け取るのに必要
モジュールの定義がまだまだ足りないですが、
取説（UOA Infomation）と雛形（下記コード）があれば
VBが少ししか分からないという人でもある程度作れるのではないかと思う。
Form
Imports System.Runtime.InteropServices
Public Class form_name
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Protected Overrides Sub WndProc(ByRef WMSG As Message)
Select Case (WMSG.Msg)
Case WM_UOA_RESOURCE_COUNT_FINISHED
Case WM_UOA_SPELL_WAS_ATTEMPTED
Case WM_UOA_LOGON
Case WM_UOA_MAGERY_SKILL_LEVEL
Case WM_UOA_CURRENT_INT_AND_MANA
Case WM_UOA_SKILL_LEVEL
Case WM_UOA_MACRO_FINISHED
Case WM_UOA_LOGOUT
Case WM_UOA_CURRENT_MAX_HP_AND_HP
Case WM_UOA_CURRENT_DEX_AND_STAM
Case WM_UOA_ADD_HOUSE_BOAT
Case WM_UOA_FACET_LAND_INFO
Case WM_UOA_POWER_HOUR_ENTERED
End Select
MyBase.WndProc(WMSG)
End Sub
End Class
Module
Imports System.Runtime.InteropServices
Module module_name
<DllImport("user32.dll", CharSet:=CharSet.Auto, _
CallingConvention:=CallingConvention.StdCall)> _
Public Function FindWindow( _
ByVal lpClassName As String, _
ByVal lpWindowName As String) As Integer
End Function
<DllImport("user32.dll", CharSet:=CharSet.Auto, _
CallingConvention:=CallingConvention.StdCall)> _
Public Function SendMessage( _
ByVal hWnd As Integer, _
ByVal wMsg As Integer, _
ByVal wParam As Integer, _
ByVal lParam As Integer) As Integer
End Function
<DllImport("kernel32.dll", CharSet:=CharSet.Unicode, _
CallingConvention:=CallingConvention.StdCall)> _
Public Function GlobalGetAtomName( _
ByVal nAtom As Integer, _
ByVal lpBuffer As System.Text.StringBuilder, _
ByVal nSize As Integer) As Integer
End Function
<DllImport("kernel32.dll", CharSet:=CharSet.Unicode, _
CallingConvention:=CallingConvention.StdCall)> _
Public Function GlobalDeleteAtom( _
ByVal nAtom As Integer) As Integer
End Function
Public Const UOA_CLASSNAME As String = "UOASSIST-TP-MSG-WND"
Public UOA_hWnd As Integer
Public Const WM_USER As Short = &H400S
Public Const WM_UOA_REQUEST_DATA As Integer = WM_USER + 200
Public Const WM_UOA_UCOUNT_RESOURCES As Integer = WM_USER + 201
Public Const WM_UOA_GET_COORDS As Integer = WM_USER + 202
Public Const WM_UOA_GET_SKILL As Integer = WM_USER + 203
Public Const WM_UOA_GET_STAT As Integer = WM_USER + 204
Public Const WM_UOA_SET_ACTIVE_MACRO As Integer = WM_USER + 205
Public Const WM_UOA_PLAY_MACRO As Integer = WM_USER + 206
Public Const WM_UOA_DISPLAY_TEXT As Integer = WM_USER + 207
Public Const WM_UOA_REQUEST_HOUSE_BOAT_INFO As Integer = WM_USER + 208
Public Const WM_UOA_ADD_COMMAND_LINE As Integer = WM_USER + 209
Public Const WM_UOA_GET_USER_ID As Integer = WM_USER + 210
Public Const WM_UOA_GET_SHARD_NAME As Integer = WM_USER + 211
Public Const WM_UOA_ADD_USER_TO_PARTY As Integer = WM_USER + 212
Public Const WM_UOA_GET_UO_WINDOW_HANDLE As Integer = WM_USER + 213
Public Const WM_UOA_GET_POISON_STATUS As Integer = WM_USER + 214
Public Const WM_UOA_SET_SKILL_LOCK As Integer = WM_USER + 215
Public Const WM_UOA_GET_ACCOUNT_IDENTIFIER As Integer = WM_USER + 216
Public Const WM_UOA_RESOURCE_COUNT_FINISHED As Integer = WM_USER + 301
Public Const WM_UOA_SPELL_WAS_ATTEMPTED As Integer = WM_USER + 302
Public Const WM_UOA_LOGON As Integer = WM_USER + 303
Public Const WM_UOA_MAGERY_SKILL_LEVEL As Integer = WM_USER + 304
Public Const WM_UOA_CURRENT_INT_AND_MANA As Integer = WM_USER + 305
Public Const WM_UOA_SKILL_LEVEL As Integer = WM_USER + 306
Public Const WM_UOA_MACRO_FINISHED As Integer = WM_USER + 307
Public Const WM_UOA_LOGOUT As Integer = WM_USER + 308
Public Const WM_UOA_CURRENT_MAX_HP_AND_HP As Integer = WM_USER + 309
Public Const WM_UOA_CURRENT_DEX_AND_STAM As Integer = WM_USER + 310
Public Const WM_UOA_ADD_HOUSE_BOAT As Integer = WM_USER + 311
Public Const WM_UOA_DELETE_HOUSE_BOAT As Integer = WM_USER + 312
Public Const WM_UOA_FACET_LAND_INFO As Integer = WM_USER + 313
Public Const WM_UOA_POWER_HOUR_ENTERED As Integer = WM_USER + 314
Public Function fncGetHIWORD( _
ByVal i As Integer) As Integer
Dim HIWORD As Integer = ((i And &HFFFF0000) \ 65536) And 65535
Return HIWORD
End Function
Public Function fncGetLOWORD( _
ByVal i As Integer) As Integer
Dim LOWORD As Integer = i And 65535
Return LOWORD
End Function
Public Function fncGetHILO( _
ByVal HI As Integer, _
ByVal LO As Integer) As Integer
Dim i As Integer
i = HI * 65536
i = i Or (LO And 65535)
Return i
End Function
Public Function fncGetWindowHandle( _
ByVal pClassName As String) As Integer
Return FindWindow(pClassName, vbNullString)
End Function
Public Function UOALink_SendMessage( _
ByVal WM_UOA As Integer, _
ByVal wParam As Integer, _
ByVal lParam As Integer) As Integer
Dim Result As Integer
mUOAWnd = fncGetWindowHandle(UOA_CLASSNAME)
If mUOAWnd = 0 Then
Return -1
End If
Result = SendMessage(mUOAWnd, WM_UOA, wParam, lParam)
Return Result
End Function
Public Function fncGetAtomString( _
ByVal nAtom As Integer) As String
Dim tmpLength As Integer = 256
Dim tmpString = New System.Text.StringBuilder(tmpLength)
Dim Result As Integer
Result = GlobalGetAtomName(nAtom, tmpString, tmpLength)
Result = GlobalDeleteAtom(nAtom)
Return tmpString.ToString
End Function
End Module
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