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调用API函数设计ABOUT窗口 -VB资料

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调用API函数设计ABOUT窗口 -VB资料

江 苏 省 镇 江 港 务 局
蔡 可 训
---- windows98 系 统 的 许 多 软 件 中 都 包 含 一 个windows 风 格 的about 窗 口, 它 向 用 户 反 映 了 当 前 系 统 的 一 些 基 本 信 息, 其 中 显 示 有 关windows 及 其 应 用 软 件 的 版 本、 版 权 和 系 统 的 工 作 状 态 等 信 息。 笔 者 用VB 6.0 通 过 调 用API 函 数 设 计 应 用 系 统 的ABOUT 窗 口。 效 果 如 图1。( 略)
1 . 建 立 含 有 如 下 控 件 的 窗 体:
   控 件   NAME   CAPTION
   窗 体   FORM1   用VB6.0 设 计ABOUT 窗 口
   命 令 按 钮  COMMAND1 关 于 销 售 管 理 系 统

2 . 程 序 清 单:
---- Private Declare Function GetWindowWord Lib "user32" (ByVal hwnd As Long, ByVal nIndex As Long) As Integer
---- Private Declare Function ShellAbout Lib "shell32.dll" Alias "ShellAboutA" (ByVal hwnd As Long, ByVal szApp As String, ByVal szOtherStuff As String, ByVal hIcon As Long) As Long

---- Private Declare Function ExtractIcon Lib "shell32.dll" Alias "ExtractIconA" (ByVal hinst As Long, ByVal lpszExeFileName As String, ByVal nIconIndex As Long) As Long Private Declare Function GetDiskFreeSpace Lib "kernel32" Alias "GetDiskFreeSpaceA" (ByVal lpRootPathName As String, lpSectorsPerCluster As Long, lpBytesPerSector As Long, lpNumberOfFreeClusters As Long, lpTotalNumberOfClusters As Long) As Long Private Declare Function GetDriveType Lib "kernel32" Alias "GetDriveTypeA" (ByVal nDrive As String) As Long

---- Private Declare Sub GetSystemInfo Lib "kernel32" (lpSystemInfo As SYSTEM_INFO) Private Declare Function GetSystemMetrics Lib "user32" (ByVal nIndex As Long) As Long

Private Const GWL_EXSTYLE = (-20)
Private Const GWL_STYLE = (-16)
Private Const GWL_WNDPROC = (-4)
Private Const GWL_HINSTANCE = (-6)
Private Type SYSTEM_INFO
    dwOemID As Long
    dwPageSize As Long
    lpMinimumApplicationAddress As Long
    lpMaximumApplicationAddress As Long
    dwActiveProcessorMask As Long
    dwNumberOrfProcessors As Long
    dwProcessorType As Long
    dwAllocationGranularity As Long
    dwReserved As Long
End Type
Private Const SM_CXSCREEN = 0
Private Const SM_CYSCREEN = 1

Private Sub Command1_Click()
Dim hinst As Long
Dim icons As Long
Dim abouts As Long
Dim dispx As String
Dim dispy As String
Dim cps As String
Dim space1 As String
Dim space2 As String
hinst = GetWindowWord(Me.hwnd, GWL_HINSTANCE)
icons = ExtractIcon(hinst, "d:\fpw26\foxprow.exe", 0)
Dim sysinfo As SYSTEM_INFO
Dim cls1 As Long
Dim cls2 As Long
Dim secs As Long
Dim bytes As Long
Dim buffs As String
buff = "C:\"
x = GetDriveType(buffs)
x = GetDiskFreeSpace(buffs, secs, bytes, cls1, cls2)
cls1 = cls1 * secs * bytes
cls2 = cls2 * secs * bytes
space1 = "C驱动器总共容量:
  " + Format$(cls2/1024, "#, #") + "千字节"
space2 = "C驱动器可用容量:
  " + Format$(cls1/1024, "#, #") + "千字节"
x = GetSystemMetrics(SM_CXSCREEN)
dispx = "显示器分辨率:" + Str$(x)
x = GetSystemMetrics(SM_CYSCREEN)
dispy = Str$(x)
Call GetSystemInfo(sysinfo)
Select Case sysinfo.dwProcessorType
Case 386
   cpus = "处理器类型:386"
Case 486
   cpus = "处理器类型:486"
Case 586
   cpus = "处理器类型:586"
End Select
abouts = ShellAbout(Me.hwnd, "演示程序",
  "销售管理系统V2.0版权所有[C]1998-1999蔡可训"
  & Chr$(13) & Chr$(10) & space1 & Chr$(13) & Chr$(10)
  & space2 & Chr$(13) & Chr$(10) & cpus + " " + dispx +
   "*" + dispy , icons)
End Sub

---- 以 上 程 序 在WINDOWS98,VISUAL BASIC 6.0 FOR WINDOWS 环 境 下 运 行 通 过. 用 户 可 以 将 其 加 入 应 用 系 统 的ABOUT 菜 单 项, 通 过 菜 单 项 调 用 它, 效 果 更 好。
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