FiveTech Support Forums

  #include "FiveWin.ch"

  function Main()

 local oDlg, oWeb

 DEFINE DIALOG oDlg FROM 0, 0 TO 600, 600 TITLE "My dialog" ;
    PIXEL TRUEPIXEL RESIZABLE

 oDlg:bStart := {|| oWeb := TWebView():New( 0, oDlg:hWnd ), ;
                    oWeb:SetParent( oDlg ), ;
                    oWeb:Navigate( "https://www.fivetechsoft.com" ) }

 oDlg:bResized := {|| If( oWeb != nil, ;
    oWeb:SetSize( oDlg:nClientWidth, oDlg:nClientHeight ), ) }

 ACTIVATE DIALOG oDlg ;
    VALID ( oWeb:End(), .T. )

  return nil

METHOD SetSize( nWidth, nHeight, nHints ) INLINE WebView_SetSize( ::hWebView, nWidth, nHeight, nHints )
``` 

The possible values are defined as constants at the top of the same file:

| Constant | Value | Meaning |
|---|---|---|
| `WEBVIEW_HINT_NONE` | 0 | Width and height are the **default size** |
| `WEBVIEW_HINT_MIN` | 1 | Width and height are **minimum bounds** |
| `WEBVIEW_HINT_MAX` | 2 | Width and height are **maximum bounds** |
| `WEBVIEW_HINT_FIXED` | 3 | Window size **cannot be changed** by the user | [0-cite-1](#0-cite-1) 

These constants come from the underlying webview library API (`webview_set_size` in `webview.h`): [0-cite-2](#0-cite-2) 

On the Win32 backend, the implementation uses these hints to set window styles and geometry constraints — for example, `WEBVIEW_HINT_MIN` sets the minimum window size, `WEBVIEW_HINT_MAX` sets the maximum, and `WEBVIEW_HINT_FIXED` removes the `WS_THICKFRAME` style to prevent resizing: 

**Important note:** This third parameter only applies to `TWebView`, not `TWebView2`. The `TWebView2:SetSize()` method only accepts two parameters (`nWidth, nHeight`) and directly calls `pController->put_Bounds()` without any hint logic. 

In your code, since you're using `TWebView` and embedding it as a child of a dialog, you're calling `oWeb:SetSize( oDlg:nClientWidth, oDlg:nClientHeight )` without the third parameter, which defaults to `WEBVIEW_HINT_NONE` (0) — meaning the values are treated as the default/current size. That's the correct usage for a resize handler.

oDlg:bResized := {|| If( oWeb != nil, ;
   SetWindowPos( oWeb:GetWindow(), 0, 0, 0, oDlg:nClientWidth, oDlg:nClientHeight, 4 ), ) }