| 使用API調用Winodws各種通用對話(huà)框(Common Diaglog)的方法（二） 1.選擇目錄/文件夾對話(huà)框
將以下代碼置于一模塊中
Option Explicit
' 調用方式:: string = BrowseForFolders(Hwnd,TitleOfDialog)
' 例如:String1 = BrowseForFolders(Hwnd, "Select target folder...")
Public Type BrowseInfo
hwndOwner As Long
pIDLRoot As Long
pszDisplayName As Long
lpszTitle As Long
ulFlags As Long
lpfnCallback As Long
lParam As Long
iImage As Long
End Type
Public Const BIF_RETURNONLYFSDIRS = 1
Public Const MAX_PATH = 260
Public Declare Sub CoTaskMemFree Lib "ole32.dll" (ByVal hMem As Long)
Public Declare Function lstrcat Lib "kernel32" Alias "lstrcatA" (ByVal lpString1 As String, ByVal lpString2 As String) As Long
Public Declare Function SHBrowseForFolder Lib "shell32" (lpbi As BrowseInfo) As Long
Public Declare Function SHGetPathFromIDList Lib "shell32" (ByVal pidList As Long, ByVal lpBuffer As String) As Long Public Function BrowseForFolder(hwndOwner As Long, sPrompt As String) As String
Dim iNull As Integer
Dim lpIDList As Long
Dim lResult As Long
Dim sPath As String
Dim udtBI As BrowseInfo
'初始化變量
With udtBI
.hwndOwner = hwndOwner
.lpszTitle = lstrcat(sPrompt, "")
.ulFlags = BIF_RETURNONLYFSDIRS
End With
'調用 API
lpIDList = SHBrowseForFolder(udtBI)
If lpIDList Then
sPath = String$(MAX_PATH, 0)
lResult = SHGetPathFromIDList(lpIDList, sPath)
Call CoTaskMemFree(lpIDList)
iNull = InStr(sPath, vbNullChar)
If iNull Then sPath = Left$(sPath, iNull - 1)
End If
'如果選擇取消, sPath = ""
BrowseForFolder = sPath
End Function
2.調用"映射網(wǎng)絡(luò )驅動(dòng)器"對話(huà)框
Private/Public Declare Function WNetConnectionDialog Lib "mpr.dll" _
(ByVal hwnd As Long, ByVal dwType As Long) As Long
x% = WNetConnectionDialog(Me.hwnd, 1)
3.調用"打開(kāi)文件"對話(huà)框
Private Type OPENFILENAME
lStructSize As Long
hwndOwner As Long
hInstance As Long
lpstrFilter As String
lpstrCustomFilter As String
nMaxCustFilter As Long
nFilterIndex As Long
lpstrFile As String
nMaxFile As Long
lpstrFileTitle As String
nMaxFileTitle As Long
lpstrInitialDir As String
lpstrTitle As String
flags As Long
nFileOffset As Integer
nFileExtension As Integer
lpstrDefExt As String
lCustData As Long
lpfnHook As Long
lpTemplateName As String
End Type
Private Declare Function GetOpenFileName Lib "comdlg32.dll" Alias "GetOpenFileNameA" (pOpenfilename As OPENFILENAME) As Long
將以下代碼置于某一事件中
Dim ofn As OPENFILENAME
ofn.lStructSize = Len(ofn)
ofn.hwndOwner = Form1.hWnd
ofn.hInstance = App.hInstance
ofn.lpstrFilter = "Text Files (*.txt)" + Chr$(0) + "*.txt" + Chr$(0) + "Rich Text Files (*.rtf)" + Chr$(0) + "*.rtf" + Chr$(0)
ofn.lpstrFile = Space$(254)
ofn.nMaxFile = 255
ofn.lpstrFileTitle = Space$(254)
ofn.nMaxFileTitle = 255
ofn.lpstrInitialDir = curdir
ofn.lpstrTitle = "Our File Open Title"
ofn.flags = 0
Dim a
a = GetOpenFileName(ofn)
If (a) Then
MsgBox "File to Open: " + Trim$(ofn.lpstrFile)
Else
MsgBox "Cancel was pressed"
End If
4.調用"打印"對話(huà)框
Private Type PrintDlg
lStructSize As Long
hwndOwner As Long
hDevMode As Long
hDevNames As Long
hdc As Long
flags As Long
nFromPage As Integer
nToPage As Integer
nMinPage As Integer
nMaxPage As Integer
nCopies As Integer
hInstance As Long
lCustData As Long
lpfnPrintHook As Long
lpfnSetupHook As Long
lpPrintTemplateName As String
lpSetupTemplateName As String
hPrintTemplate As Long
hSetupTemplate As Long
End Type
Private Declare Function PrintDlg Lib "comdlg32.dll" Alias "PrintDlgA" (pPrintdlg As PrintDlg) As Long
'將以下代碼置于某一事件中
Dim tPrintDlg As PrintDlg
tPrintDlg.lStructSize = Len(tPrintDlg)
tPrintDlg.hwndOwner = Me.hwnd
tPrintDlg.hdc = hdc
tPrintDlg.flags = 0
tPrintDlg.nFromPage = 0
tPrintDlg.nToPage = 0
tPrintDlg.nMinPage = 0
tPrintDlg.nMaxPage = 0
tPrintDlg.nCopies = 1
tPrintDlg.hInstance = App.hInstance
lpPrintTemplateName = "Print Page"
Dim a
a = PrintDlg(tPrintDlg)
If a Then
lFromPage = tPrintDlg.nFromPage
lToPage = tPrintDlg.nToPage
lMin = tPrintDlg.nMinPage
lMax = tPrintDlg.nMaxPage
lCopies = tPrintDlg.nCopies
PrintMyPage 'Custom printing Subroutine
End If |
