MFC AFX_MANAGE_STATE(AfxGetStaticModuleState())
//该用于模块切换时的状态保护
AFX_MANAGE_STATE(AfxGetStaticModuleState());
(1)AfxGetStaticModuleState()指向当前模块状态;
(2)当前函数调用结束后原模块的状态自动被恢复;
(3)用于DLL中所调用MFC函数、类、资源时的模块状态切换;
来自MSDN的解释:
By default, MFC uses the resource handle of the main application to load the resource template. If you have an exported function in a DLL, such as one that launches a dialog box in the DLL, this template is actually stored in the DLL module. You need to switch the module state for the correct handle to be used. You can do this by adding the following code to the beginning of the function:
AFX_MANAGE_STATE(AfxGetStaticModuleState( ));
This swaps the current module state with the state returned from AfxGetStaticModuleState until the end of the current scope.
译:
默认情况下,MFC使用主应用程序的资源句柄来加载资源模板。如果DLL中有导出的函数,例如在DLL中启动对话框的函数,则此模板实际上存储在DLL模块中。您需要切换模块状态才能使用正确的句柄。您可以通过在函数的开头添加以下代码来完成此操作:AFX_MANAGE_STATE(AfxGetStaticModuleState( )); 这将当前模块状态与从AfxGetStaticModuleState返回的状态交换,直到当前作用域结束。