VC++中把窗体封装到dll中并调用（国外英文资料）.docVIP

VC++中把窗体封装到dll中并调用（国外英文资料） Use resources in a DLL The most commonly seen problem with DLLS is how to use dialogs in DLLS, which is a common problem about how to use resources in a DLL. Here we analyze and solve this problem from two aspects of Win32 DLL and MFC DLL. 1. The Win32 DLL Using the dialog box in the Win32 DLL is simple, you only need to add dialog-box resources in your DLL, and you can set the controls you need on the dialog. And then using DialogBox or CreateDialog these two functions (or other functions of the same effect) to create the dialog box, and define your own dialog box dialog box callback function processing the received message. Here is a concrete example to learn how to use the dialog in a Win32 DLL. Follow these steps to complete the example: 1) File - New in the VC menu to create A New Win32 dynamic-link Library project named UseDlg, and select A simple DLL project. 2) add a Dialog Resource with an ID to IDD_DLG_SHOW in the VC menu, remove the Cancel button from this Dialog, and just leave the OK button. Add an IDD_ABOUTBOX dialog with a Caption for About. Save this resource, name the resource file UseDlg. Rc. And put the resource. H and UseDlg. Rc into the project. 3) contains the resource.h in the UseDlg app and adds the following code: HINSTANCE hinst = NULL; HWND hwndDLG = NULL; BOOL CALLBACK DlgProc (HWND hDlg, UINT message, WPARAM WPARAM, LPARAM LPARAM); BOOL CALLBACK AboutProc (HWND hDlg, UINT message, WPARAM WPARAM, LPARAM LPARAM); Extern C __declspec (dllexport) void ShowDlg (); BOOL APIENTRY DllMain (HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved ) { The switch (ul_reason_for_call) { Case DLL_PROCESS_ATTACH: Hinst = (HINSTANCE) hModule; Case DLL_PROCESS_DETACH: Break; } Return TRUE; } Extern C __declspec (dllexport) void ShowDlg () { HwndDLG = CreateDialog (hinst, MAKEINTRESOURCE (IDD_DLG_SHOW), NULL, (DLGPROC). ShowWindow (hwndDLG, SW_SHOW); } BOOL CALLBACK DlgProc (HWND hDlg, UINT message, WPARAM WPARAM, LPARAM LP