Test of using a 128 pixel square icon.

[hutch--]

Code does not get much simpler than this. I needed to test putting a large icon in a dialog.

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    include \masm32\include64\masm64rt.inc

    .data?
      hInstance dq ?
      hIcon     dq ?

    .code

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entry_point proc

    mov hInstance, rv(GetModuleHandle,0)

  ; -------------------------------------------------------------
  ; set the icon loaded size here to match the original icon size
  ; -------------------------------------------------------------
    mov hIcon, rv(LoadImage,hInstance,10,IMAGE_ICON,128,128,LR_DEFAULTCOLOR)
    invoke DialogBoxParam,hInstance,100,0,ADDR main,hIcon       ; create a modal dialog
    invoke ExitProcess,0

    ret

entry_point endp

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main proc hWin:QWORD,uMsg:QWORD,wParam:QWORD,lParam:QWORD

    .switch uMsg
      .case WM_INITDIALOG
      ; ------------------------------------------------------
      ; lParam is the icon handle passed from DialogBoxParam()
      ; ------------------------------------------------------
        invoke SendMessage,hWin,WM_SETICON,1,lParam     ; set the icon for the dialog
        invoke SendMessage,rv(GetDlgItem,hWin,102), \   ; set the icon in the client area
               STM_SETIMAGE,IMAGE_ICON,lParam
        invoke SetWindowText,hWin,"Big Icon Demo"
        .return TRUE

      .case WM_COMMAND
        .switch wParam
          .case 101
            jmp exit_dialog             ; The EXIT button
        .endsw

      .case WM_CLOSE
        exit_dialog:
        invoke EndDialog,hWin,0         ; exit from system menu
    .endsw

    xor rax, rax
    ret

main endp

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    end