Updating Resources

最新推荐文章于 2022-05-09 18:25:28 发布

转载最新推荐文章于 2022-05-09 18:25:28 发布 · 661 阅读

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#resources #dialog #function #file #null

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本文通过一个具体实例展示了如何从一个可执行文件中复制对话框资源到另一个可执行文件中。步骤包括加载源文件、定位资源、加载资源到内存、锁定资源、打开目标文件、更新资源并完成更新。

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Updating Resources

The following example copies a dialog box resource from one executable file, Hand.exe, to another, Foot.exe, by following these steps:

Use the LoadLibrary function to load the executable file Hand.exe.
Use the FindResource and LoadResource functions to locate and load the dialog box resource.
Use the LockResource function to retrieve a pointer to the dialog box resource data.
Use the BeginUpdateResource function to open an update handle to Foot.exe.
Use the UpdateResource function to copy the dialog box resource from Hand.exe to Foot.exe.
Use the EndUpdateResource function to complete the update.

The following code implements these steps.

HRSRC hResLoad;     // handle to loaded resource
HANDLE hExe;        // handle to existing .EXE file
HRSRC hRes;         // handle/ptr. to res. info. in hExe
HANDLE hUpdateRes; // update resource handle
char *lpResLock;    // pointer to resource data
BOOL result;
// Load the .EXE file that contains the dialog box you want to copy.
hExe = LoadLibrary("hand.exe");
if (hExe == NULL)
{
    ErrorHandler("Could not load exe.");
}

// Locate the dialog box resource in the .EXE file.
hRes = FindResource(hExe, "AboutBox", RT_DIALOG);
if (hRes == NULL)
{
    ErrorHandler("Could not locate dialog box.");
}

// Load the dialog box into global memory.
hResLoad = LoadResource(hExe, hRes);
if (hResLoad == NULL)
{
    ErrorHandler("Could not load dialog box.");
}

// Lock the dialog box into global memory.
lpResLock = LockResource(hResLoad);
if (lpResLock == NULL)
{
    ErrorHandler("Could not lock dialog box.");
}

// Open the file to which you want to add the dialog box resource.
hUpdateRes = BeginUpdateResource("foot.exe", FALSE);
if (hUpdateRes == NULL)
{
    ErrorHandler("Could not open file for writing.");
}

// Add the dialog box resource to the update list.
result = UpdateResource(hUpdateRes,       // update resource handle
     RT_DIALOG,                   // change dialog box resource
     "AboutBox",                  // dialog box name
     MAKELANGID(LANG_NEUTRAL, SUBLANG_NEUTRAL), // neutral language
     lpResLock,                   // ptr to resource info
     SizeofResource(hExe, hRes)); // size of resource info.
if (result == FALSE)
{
    ErrorHandler("Could not add resource.");
}

// Write changes to FOOT.EXE and then close it.
if (!EndUpdateResource(hUpdateRes, FALSE))
{
    ErrorHandler("Could not write changes to file.");
}

// Clean up.
if (!FreeLibrary(hExe))
{
    ErrorHandler("Could not free executable.");
}