Question

此问题与Using an icon on a dialog box window C++ Win32 API不同，我正在尝试将自定义图标添加到对话框的客户区中。当我运行代码时，我得到一个默认的Windows图标，而不是我想要的自定义图标。如果我将IDI_ICON1的值更改为80到120之间的任何数字，我将获得不同的Windows图标;我尝试过更高的数字但是什么都没有出现。我看到cplusplus.com的某个人遇到了同样的错误，我做了同样的事情，但没有什么区别。

Microsoft's有关图标的参考。

当我运行代码时：

Visual Studio说它看起来像这样：

Source.cpp

#pragma comment(lib,"ole32.lib")
#pragma comment(linker,"\"/manifestdependency:type='win32' \
name='Microsoft.Windows.Common-Controls' version='6.0.0.0' \
processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")

_TCHAR szClassName[] = "StackOverflow";
HWND hwnd;

LRESULT CALLBACK WindowProcedure(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK DialogProc(HWND handle, UINT message, WPARAM wparam, LPARAM lparam);

int _stdcall WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR CmdLine, int nShowCmd)
{
    MSG messages;
    WNDCLASSEX wincl;
    HWND about;

    wincl.cbSize = sizeof(WNDCLASSEX);
    wincl.style = CS_DBLCLKS;
    wincl.lpfnWndProc = WindowProcedure;
    wincl.cbClsExtra = 0;
    wincl.cbWndExtra = 0;
    wincl.hInstance = hInstance;
    wincl.hIcon = LoadIcon(GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_ICON1));
    wincl.hCursor = LoadCursor(NULL, IDC_ARROW);
    wincl.hbrBackground = (HBRUSH)COLOR_WINDOW;//COLOR_BACKGROUND;
    wincl.lpszMenuName = NULL;
    wincl.lpszClassName = szClassName;
    wincl.hIconSm = LoadIcon(GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_ICON1));

    if(!RegisterClassEx(&wincl))
        return 0;

    hwnd = CreateWindowEx(WS_EX_LEFT | WS_EX_LTRREADING | WS_EX_WINDOWEDGE,     //dwExStyle
        szClassName,                                                            //ClassName
        "StackOverflow",                                                        //WindowName
        WS_OVERLAPPED | WS_SYSMENU | WS_CAPTION | WS_EX_PALETTEWINDOW,          //Window Style
        CW_USEDEFAULT,                                                          //Horizontal Pos
        CW_USEDEFAULT,                                                          //Verticals Pos
        100,                                                                    //Width
        100,                                                                    //Height
        HWND_DESKTOP,                                                           //Parent
        NULL,                                                                   //Menu
        hInstance,                                                              //Module Assoc  
        NULL);                                                                  //CreateStruct

    about = CreateDialog(   NULL,
                            MAKEINTRESOURCE(IDD_DIALOG),
                            hwnd,
                            DialogProc);

    while (GetMessage(&messages, NULL, 0, 0))
    {
        TranslateMessage(&messages);
        DispatchMessage(&messages);
    }

    return messages.wParam;
}

INT_PTR CALLBACK DialogProc(HWND handle, UINT message, WPARAM wparam, LPARAM lparam)
{
    switch (message)
    {
    case WM_INITDIALOG:
        //This changes the Icon in the TitleBar
        SendMessage(handle, WM_SETICON, ICON_SMALL,
            (LPARAM)LoadIcon(GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_ICON1)));
        return TRUE;
    case WM_CLOSE:
        DestroyWindow(handle);
        return TRUE;
    case WM_DESTROY:
        PostQuitMessage(0);
        return TRUE;
    case WM_COMMAND:
        switch (LOWORD(wparam))
        {
        case IDCOK:
            //TODO
        case IDCANCEL:
            //EndDialog(handle,wparam);
            DestroyWindow(handle);
            return TRUE;
        default:
            return FALSE;
        }
    default:
        return FALSE;
    }
    return FALSE;
}

LRESULT CALLBACK WindowProcedure(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    return DefWindowProc(hwnd, message, wParam, lParam);
}

StackOverflow.rc

#include "resource.h"

IDD_DIALOG DIALOGEX 0, 0, 245, 57
STYLE DS_SETFONT | DS_MODALFRAME | DS_SETFOREGROUND | DS_FIXEDSYS | DS_CENTER | WS_POPUP | WS_VISIBLE | WS_CAPTION | WS_SYSMENU
CAPTION "About Dialog"
FONT 10, "MS Shell Dlg", 400, 0, 0x1
BEGIN
    DEFPUSHBUTTON   "OK",IDOK,166,7,50,14
    PUSHBUTTON      "Cancel",2,166,30,50,14
    LTEXT           "The Icon here needs to match the one in the Titlebar",IDC_STATIC,50,15,107,28
    ICON            IDI_ICON1,103,19,16,20,20, SS_ICON
END

// Icon with lowest ID value placed first to ensure application icon
// remains consistent on all systems.
IDI_ICON1               ICON                    "C:\\Users\\pixel\\Desktop\\MEIN.ico"

RESOURCE.H

//{{NO_DEPENDENCIES}}
// Microsoft Visual C++ generated include file.
// Used by StackOverflow.rc
//
#define IDD_DIALOG                      101
#define IDI_ICON1                       103
#define IDCOK                           105
#define IDCANCEL                        106

Answer 1

问题是您对CreateDialog的调用没有提供模块句柄，这会阻止图标控件在程序的资源中找到指定的图标。

显然在这种情况下，它默认查看系统图像列表，这就是您看到系统图标出现的原因（并在您更改ID时更改）。

将您的电话改为：

about = CreateDialog(hInstance,
                        MAKEINTRESOURCE(IDD_DIALOG),
                        hwnd,
                        DialogProc);

如何在对话框的客户区中包含自定义图标？

1 个答案: