Originariamente inviato da evil80
grazie.
in sostanza quindi è programmazione delle API ?

Ti chiedo solo un'ultima cosa :
ma le API in realtà quanto sono importanti ?
nel senso ti è capitato spesso di ricorrere alla programmazione della API ?

Ciao
si il subclassing si basa sull'Api sendmessage

le api sono importanti se vuoi superare i limiti di visualbasic

di norma ne dichiaro una quindicina in un programma
codice:
'Chiamate api
Declare Function FindWindowEx Lib "user32" Alias "FindWindowExA" _
   (ByVal hWnd1 As Long, ByVal hWnd2 As Long, ByVal lpsz1 As String, _
   ByVal lpsz2 As String) As Long
Declare Function SendMessage Lib "user32" Alias "SendMessageA" _
   (ByVal hWnd As Long, ByVal wMsg As Long, _
   ByVal wParam As Long, lParam As Any) As Long
Declare Function SetParent Lib "user32" _
   (ByVal hWndChild As Long, ByVal hWndNewParent As Long) As Long
Declare Function GetDC Lib "user32" _
   (ByVal hWnd As Long) As Long
Declare Function ReleaseDC Lib "user32" _
   (ByVal hWnd As Long, ByVal hDC As Long) As Long
Declare Function ImageList_SetBkColor Lib "ComCtl32" _
   (ByVal hIml As Long, ByVal clrBk As Long) As Long
Declare Function SetWindowLong Lib "user32" _
   Alias "SetWindowLongA" (ByVal hWnd As Long, ByVal _
   nIndex As Long, ByVal dwNewLong As Long) As Long
Declare Function GetWindowLong Lib "user32" _
   Alias "GetWindowLongA" (ByVal hWnd As Long, ByVal _
   nIndex As Long) As Long
Declare Function GetSystemMenu Lib "user32" _
   (ByVal hWnd As Long, ByVal bRevert As Long) As Long
Declare Function GetMenuItemCount Lib "user32" _
   (ByVal hMenu As Long) As Long
Declare Function DrawMenuBar Lib "user32" _
   (ByVal hWnd As Long) As Long
Declare Function RemoveMenu Lib "user32" _
   (ByVal hMenu As Long, ByVal nPosition As Long, _
   ByVal wFlags As Long) As Long
Declare Function GetUserName Lib "advapi32.dll" Alias "GetUserNameA" _
   (ByVal lpBuffer As String, nSize As Long) As Long
Declare Function GetTickCount Lib "kernel32" () As Long
Declare Function GetVolumeInformation Lib "kernel32" Alias "GetVolumeInformationA" _
   (ByVal lpRootPathName As String, ByVal lpVolumeNameBuffer As String, _
   ByVal nVolumeNameSize As Long, lpVolumeSerial_Numberber As Long, _
   lpMaximumComponentLength As Long, lpFileSystemFlags As Long, _
   ByVal lpFileSystemNameBuffer As String, ByVal nFileSystemNameSize As Long) As Long
Declare Function SetWindowPos Lib "user32" _
    (ByVal hWnd As Long, ByVal hWndInsertAfter As Long, _
    ByVal X As Long, ByVal Y As Long, ByVal cx As Long, _
    ByVal cy As Long, ByVal wFlags As Long) As Long