我懂java，但对c++和VisualStudio完全陌生。我试图从两个源文件（cpp和h）构建一个dll文件。为了在java应用程序（jni/jna）中使用本机函数，我需要这个。这是一种全局键挂钩，应该重新Map键盘按钮，我希望。
但当我粘贴源代码时，有些地方用红色突出显示，上面写着：
cpp文件
“无法打开源文件w32api.h”。我用vs和俄语，所以我翻译了它。

“error type”jniexport此声明不包含存储类或类型说明符

h文件
“error type”jniexport此声明不包含存储类或类型说明符

下面是源代码：
remapkeys.h公司

/* DO NOT EDIT THIS FILE - it is machine generated */

# include <jni.h>

/* Header for class com_cooltrickshome_RemapKeys */

# ifndef _Included_com_cooltrickshome_RemapKeys

# define _Included_com_cooltrickshome_RemapKeys

# ifdef __cplusplus

extern "C" {

# endif

    /*
     * Class:     com_cooltrickshome_RemapKeys
     * Method:    remapPassedKeys
     * Signature: (II)V
     */
    JNIEXPORT void JNICALL Java_com_cooltrickshome_RemapKeys_remapPassedKeys
    (JNIEnv*, jobject, jint, jint);

# ifdef __cplusplus

}

# endif

# endif

remapkeys.cpp文件

# include <stdio.h>

# include <windows.h>

# include <w32api.h>

# include "RemapKeys.h"

static HHOOK handleKeyboardHook = NULL;
HINSTANCE hInst = NULL;
DWORD oldKey = NULL;
DWORD newKey = NULL;

static LRESULT CALLBACK LowLevelKeyboardProc(int nCode, WPARAM wParam, LPARAM lParam) {

    if (nCode == HC_ACTION)
    {
        KBDLLHOOKSTRUCT* p = (KBDLLHOOKSTRUCT*)lParam;
        if (p->vkCode == oldKey)
        {
            switch (wParam) {

            case WM_KEYDOWN: {
                keybd_event(newKey, 0x1D, KEYEVENTF_EXTENDEDKEY | 0, 0);
                break;
            }

            case WM_KEYUP: {
                keybd_event(newKey, 0x1D, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
                break;
            }

            default:
                wParam = WM_SYSKEYDOWN;
                break;
            }
            return 1;
        }
    }
    return CallNextHookEx(handleKeyboardHook, nCode, wParam, lParam);
}

JNIEXPORT void JNICALL Java_com_cooltrickshome_RemapKeys_remapPassedKeys
(JNIEnv*, jobject, jint oldValue, jint newValue) {

    /* printf("Your message here\n");
       fflush(stdout);*/

    oldKey = oldValue;
    newKey = newValue;

    hInst = GetModuleHandle(NULL);
    handleKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, LowLevelKeyboardProc, hInst, 0);

    MSG msg;
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
}

我做错了什么？有人能帮我吗？先谢谢你。