c - 未创建对话框

Question

在一个简单的 WINAPI 程序中，我制作了一个对话框(我用 ResEdit 制作的)。

但是，对话框未显示，DialogBox() 调用返回 -1。 GetLastError() 返回 1812(指定的图像文件不包含资源部分。)

主要.cpp

/*default stuff, like including windows.h, etc... */
int WINAPI WinMain (HINSTANCE hThisInstance,
                 HINSTANCE hPrevInstance,
                 LPSTR lpszArgument,
                 int nCmdShow)
{
hInst = hThisInstance;
HWND hwnd;               /* This is the handle for our window */
MSG messages;            /* Here messages to the application are saved */
WNDCLASSEX wincl;        /* Data structure for the windowclass */

/*default stuff, initializing fields of WNDCLASSEX struct */

hwnd = CreateWindowEx (
       0,                   /* Extended possibilites for variation */
       szClassName,         /* Classname */
       _T("Hello World"),   /* Title Text */
       WS_OVERLAPPEDWINDOW, /* default window */
       CW_USEDEFAULT,       /* Windows decides the position */
       CW_USEDEFAULT,       /* where the window ends up on the screen */
       544,                 /* The programs width */
       375,                 /* and height in pixels */
       0,        /* The window is a child-window to desktop */
       NULL,                /* No menu */
       hThisInstance,       /* Program Instance handler */
       NULL                 /* No Window Creation data */
       );
/* Creating controls ... */

/* Make the window visible on the screen */
ShowWindow (hwnd, nCmdShow);

/* Default : message loop. It will run until GetMessage() returns 0 */

/* The program return-value is 0 - The value that PostQuitMessage() gave */
return messages.wParam;
}


/*  This function is called by the Windows function DispatchMessage()  */

LRESULT CALLBACK WindowProcedure(HWND hwnd, UINT message, WPARAM wParam,   LPARAM lParam)
{
switch (message)                  /* handle the messages */
{
    case WM_CREATE:
        HMENU hMenu, hSubMenu;
        HICON hIcon, hIconSm;
        hMenu = CreateMenu();
        hSubMenu = CreatePopupMenu();

        AppendMenu(hSubMenu, MF_STRING, ID_FILE_EXIT, "E&xit");
        AppendMenu(hMenu, MF_STRING | MF_POPUP, (UINT) hSubMenu, "&File");

        hSubMenu = CreatePopupMenu();
        AppendMenu(hSubMenu, MF_STRING, ID_HELP_ABT, "&About");
        AppendMenu(hMenu, MF_STRING | MF_POPUP, (UINT) hSubMenu, "&Help");

        SetMenu(hwnd, hMenu);

        hIcon = (HICON) LoadImage(NULL, "iconBIG.ico", IMAGE_ICON, 32, 32, LR_LOADFROMFILE);
        if (hIcon)
            SendMessage(hwnd, WM_SETICON, ICON_BIG, (LPARAM) hIcon);
        hIconSm = (HICON) LoadImage(NULL, "iconSMALL.ico", IMAGE_ICON, 16, 16, LR_LOADFROMFILE);
        if (hIconSm)
            SendMessage(hwnd, WM_SETICON, ICON_SMALL, (LPARAM) hIconSm);

        break;
    case WM_DESTROY:
        PostQuitMessage(0);       /* send a WM_QUIT to the message queue */
        break;
    case WM_COMMAND:
        switch (LOWORD(wParam)) {
        case IDC_ACCEPTBTN:
            /* handling the controls */
            break;
        case ID_FILE_EXIT:
            /* handling more controls ... */
            PostQuitMessage(0);
            break;
        case ID_HELP_ABT:
            int ret = DialogBox(GetModuleHandle, MAKEINTRESOURCE(IDD_DIALOG1), hwnd, myDialog); 
/*PROBLEM: DialogBox returns -1*/

            if (ret == -1) {
                DWORD dw = GetLastError(); // error 1812
                char buffer[70];
                sprintf(buffer, "Failed with %d", dw);


                MessageBox(hwnd, buffer, "", MB_OK);
            }
            break;
        }
        break;
    default:
        return DefWindowProc(hwnd, message, wParam, lParam);
}
return 0;
}
BOOL CALLBACK myDialog(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch (msg) {
case WM_INITDIALOG:
    return TRUE;
case WM_COMMAND:
    switch (LOWORD(wParam)) {
    case IDOK:
        EndDialog(hwnd, IDOK);
        break;
    case IDCANCEL:
        EndDialog(hwnd, IDCANCEL);
        break;
    }
    break;
default: return FALSE;
}
}

资源对话框.rc

#include <windows.h>
#include <commctrl.h>
#include <richedit.h>
#include "resource.h"

LANGUAGE 0, SUBLANG_NEUTRAL
IDD_DIALOG1 DIALOG 0, 0, 186, 95
STYLE DS_3DLOOK | DS_CENTER | DS_MODALFRAME | DS_SHELLFONT | WS_CAPTION |       WS_VISIBLE | WS_POPUP | WS_SYSMENU
CAPTION "Dialog"
FONT 8, "Ms Shell Dlg"
{
GROUPBOX        "Static", 0, 3, 7, 118, 82, 0, WS_EX_LEFT
LTEXT           "hello,\nworld!", 0, 16, 21, 20, 17, SS_LEFT, WS_EX_LEFT
PUSHBUTTON      "Cancel", IDCANCEL, 129, 24, 50, 14, 0, WS_EX_LEFT
DEFPUSHBUTTON   "OK", IDOK, 129, 7, 50, 14, 0, WS_EX_LEFT
}

资源.h

#ifndef IDC_STATIC
#define IDC_STATIC (-1)
#endif

#define IDD_DIALOG1                             100
/* Dont redefine IDOK and IDCANCEL */
/*#define IDOK                                    40000
#define IDCANCEL                                40001*/

为什么对话框不显示？我正在遵循 winprog.org 的教程并按照他们说的去做。

想法:代码块编译器:GCC

Answer 1

GetModuleHandle是一个函数。您不能将函数名称传递给 HINSTANCE DialogBox() 的参数并期望它起作用。事实上，我什至对它编译感到惊讶!为当前可执行文件调用它的正确方法是 GetModuleHandle(NULL) .

但是有一个更好的方法:第一个参数给WinMain()也是HINSTANCE你的可执行文件。只需将其存储在全局变量中并直接使用即可。

---

在包含 <windows.h> 之前添加以下行应该有助于捕获类似这样的 future 错误:

#define STRICT