如何将 属性 页面添加到 CPrintDialogEx

Question

我正在尝试实现 CPrintDialogEx。我还有一些其他需要的选项，我想向 window 添加另一个 属性 页面。没有 MFC 示例，尝试 Win API 示例失败得很惨。它兑现。我做错了什么？

CPrintDialogEx dlg;
PROPSHEETPAGE optionsPage1;
HPROPSHEETPAGE hOptionsPage;
memset(&optionsPage1, 0, sizeof(PROPSHEETPAGE));
optionsPage1.dwSize = sizeof(PROPSHEETPAGE);
optionsPage1.dwFlags = PSP_DLGINDIRECT;
optionsPage1.hInstance = AfxGetInstanceHandle();
optionsPage1.pszTemplate = MAKEINTRESOURCE(IDD_QREPORT_OPTIONS);
optionsPage1.pResource = (DLGTEMPLATE*)IDD_QREPORT_OPTIONS;
optionsPage1.hIcon = NULL;
optionsPage1.pszIcon = NULL;
optionsPage1.pszTitle = "Options";
optionsPage1.pfnDlgProc = AfxWndProc; 
optionsPage1.lParam = NULL;
dlg.m_pdex.nPropertyPages = 1;
hOptionsPage = CreatePropertySheetPage(&optionsPage1);
dlg.m_pdex.lphPropertyPages = &hOptionsPage;
if (dlg.DoModal() == IDOK)

空指针崩溃

Answer 1

optionsPage1.dwFlags = PSP_DLGINDIRECT;
...
optionsPage1.pResource = (DLGTEMPLATE*)IDD_QREPORT_OPTIONS;

IDD_QREPORT_OPTIONS是一个整数，不应该强制转换成DLGTEMPLATE*。这样做会将 pResource 指向某个随机内存地址，这很可能是崩溃的原因。

反正你不需要pResource。将 PSP_DLGINDIRECT 替换为 PSP_DEFAULT，这将指示 CreatePropertySheetPage 使用 pszTemplate。

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PROPSHEETPAGE 文档：

pszTemplate

Type: LPCSTR

Dialog box template to use to create the page. This member can specify either the resource identifier of the template or the address of a string that specifies the name of the template. If the PSP_DLGINDIRECT flag in the dwFlags member is set, pszTemplate is ignored. This member is declared as a union with pResource.

示例：

INT_PTR CALLBACK dlgproc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch(uMsg)
    {
    case WM_COMMAND:
        if(LOWORD(wParam) == IDC_BUTTON1)
            MessageBox(hwnd, _T("test"), 0, 0);
        return 0;
    }
    return FALSE;
}

PROPSHEETPAGE optionsPage1 = { 0 };
optionsPage1.dwSize = sizeof(PROPSHEETPAGE);
optionsPage1.dwFlags = PSP_DEFAULT | PSP_USETITLE;
optionsPage1.hInstance = AfxGetInstanceHandle();
optionsPage1.pszTemplate = MAKEINTRESOURCE(IDD_QREPORT_OPTIONS);
optionsPage1.pszTitle = _T("Options");
optionsPage1.pfnDlgProc = dlgproc;// AfxWndProc;