vb.net 調用C語言可執(zhí)行程序并傳值？

在c語言中每一個變量都有兩個屬性一個是值，一個是址。比如inta=2;變量a的值是2，變量a的地址，可以用取地址

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操作符

獲取，即a。因此以C語言的函數(shù)傳遞中具備兩種方式傳遞參數(shù)，一種是傳址，一種傳值。比如voidf1(intv){;}//函數(shù)f1v

VB.NET把dll嵌入到exe內(nèi)部。

我的方案是將相關dll的放入vb的資源文件中,生成exe,在exe執(zhí)行時先將dll釋放到exe目錄(或path所在目錄),這樣就只有1個exe就可以了

如何用VB.NET把執(zhí)行文件加到窗體中

加以一個panel用來顯示應用程序的，就是放你那個easycap的，代碼如下

Declare Function SetParent Lib "user32" Alias "SetParent" (ByVal hWndChild As IntPtr, ByVal hWndNewParent As IntPtr) As Integer

Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As IntPtr

Private Declare Function SendMessage Lib "user32.dll" Alias "SendMessageA" (ByVal hwnd As Int32, ByVal wMsg As Int32, ByVal wParam As Int32, ByVal lParam As Int32) As Int32

Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hwnd As Int32, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Int32) As Int32

Private Const WM_SYSCOMMAND As Int32 = H112

Private Const SC_MAXIMIZE As Int32 = HF030

Private Const SC_MINIMIZE As Int32 = HF020

Private Const SC_RESTORE As Int32 = HF120

Public Const SW_HIDE = 0

Public Const SW_SHOW = 5

Private Declare Function ShowWindow Lib "user32.dll" (ByVal hwnd As Int32, ByVal nCmdShow As Int32) As Int32

Private Sub Button1_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

ShellExecute(Me.Panel1.Handle, "open", "c:\windows\system32\cmd.exe", Nothing, ".", SW_HIDE)

System.Threading.Thread.Sleep(50)

Dim h As IntPtr = FindWindow(Nothing, "c:\windows\system32\cmd.exe")

ShowWindow(h, SW_HIDE)

SetParent(h, Me.Panel1.Handle) '嵌到panel1內(nèi)

SendMessage(h, WM_SYSCOMMAND, SC_MAXIMIZE, 0)

End Sub

把其中的c:\windows\system32\cmd.exe換成你要嵌入的應用程序