. Net (C #) platform call: Use enumwindows and getwindowtext to list windows

For API enumwindows, the first parameter wndenumproc is a function pointer type (enumwindowsproc), and hwnd represents the form handle. The second lparam represents the second parameter of enumwindows, that is, the User-Defined Object (parameter) that is passed in the callback function ).

 

Enumwindows can only obtain the handle of one form. Therefore, getwindowtext is used to return the title of the window.

 

Code:

// Function pointer type

Delegate Bool Enumwindowsproc(IntptrHwnd,IntptrLparam );

 

[Dllimport("User32.dll")]

Static Extern IntEnumwindows (EnumwindowsprocHwnd,IntptrLparam );

 

[Dllimport("User32.dll", Charset= Charset.Auto)]

Static Extern IntGetwindowtext (IntptrHwnd,StringbuilderLptext,IntNcount );

 

// Callback function

Static BoolPrintwindow (IntptrHwnd,IntptrLparam)

{

// Allocate space

VaRSb= New Stringbuilder(50);

Getwindowtext (hwnd, Sb, sb.Capacity );

// Note that some windows do not have a title

If(Sb.Tostring ()! = String.Empty)

Console.Writeline (sb.Tostring ());

// The callback function returns a value.

Return True;

}

 

Static VoidMain ()

{

Enumwindows (printwindow,Intptr.Zero );

}