Win32 编程

了解 Windows 操作系统的机制以及 Windows API 的使用。

文件操作

读取文件

#include<windows.h>

int main() {
    // 定义文件名或路径
    const char* fileName = "file";
    // 打开文件句柄
    HANDLE hFile = CreateFileA(
        fileName,
        GENERIC_READ | GENERIC_WRITE,
        0,
        NULL,
        OPEN_EXISTING,
        FILE_ATTRIBUTE_NORMAL,
        NULL
    );
    if (hFile == INVALID_HANDLE_VALUE) {
        return -1;
    }
    // 获取文件大小
    DWORD fileSize = GetFileSize(hFile, NULL);
    if (fileSize == INVALID_FILE_SIZE) {
        CloseHandle(hFile);
        return -1;
    }
    // 分配内存
    BYTE* buffer = (BYTE*)VirtualAlloc(NULL, fileSize, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
    if (buffer == NULL) {
        CloseHandle(hFile);
        return -1;
    }
    // 读取文件内容至buffer
    DWORD byteRead;
    BOOL result = ReadFile(hFile, buffer, fileSize, &byteRead, NULL);
    if (!result) {
        CloseHandle(hFile);
        return -1;
    }
    CloseHandle(hFile);
    return 0;
}

资源操作

#include<windows.h>

int main() {
    const char* resourceName = "";
    DWORD resourceSize = 0;
    HRSRC res = FindResourceA(NULL, resourceName, MAKEINTRESOURCEA(RT_RCDATA));
    if (res == NULL) {
        return NULL;
    }

    HGLOBAL resHandle = LoadResource(NULL, res);
    if (resHandle == NULL) {
        return NULL;
    }

    resourceSize = SizeofResource(NULL, res);
    if (resourceSize == 0) {
        return NULL;
    }

    BYTE* resourceData = (BYTE*)LockResource(resHandle);
    if (resourceData == NULL) {
        return NULL;
    }

    BYTE* data = (BYTE*)malloc(resourceSize);
    if (data == NULL) {
        return NULL;
    }
    memcpy(data, resourceData, resourceSize);
}

注册表操作

#include <Windows.h>

int main()
{
    const char* name = "注册表键名";
    const char* value = "注册表键值";
    HKEY key;
    LONG result;

    // 创建注册表并写入
    result = RegCreateKeyA(
        HKEY_CURRENT_USER,
        "Software\\Application",
        &key
    );
    if (result == ERROR_SUCCESS) {
        result = RegSetValueExA(
            key,
            name,
            0,
            REG_SZ,
            (BYTE*)value,
            strlen(value) + 1
        );
    }
    RegCloseKey(key);

    // 写入已有注册表
    result = RegOpenKeyExA(
        HKEY_CURRENT_USER,
        "Software\\Application",
        0,
        KEY_READ | KEY_WRITE,
        &key
    );
    if (result == ERROR_SUCCESS) {
        result = RegSetValueExA(
            key,
            name,
            0,
            REG_SZ,
            (BYTE*)value,
            strlen(value) + 1
        );
    }
    RegCloseKey(key);

    // 读取注册表
    result = RegOpenKeyExA(
        HKEY_CURRENT_USER,
        "Software\\Application",
        0,
        KEY_READ,
        &key
    );
    if (result == ERROR_SUCCESS) {
        DWORD size = 1024;
        char* readValue = new char[size];
        result = RegQueryValueExA(
            key,
            name,
            0,
            NULL,
            (BYTE*)readValue,
            &size
        );
        if (result == ERROR_SUCCESS) {
            printf("value: %s", readValue);
        }
    }
}