JNI Question,help me thx!!

Question

Setp1:
//Setdisp.java
class Setdisp {    
public native static void greeting();
static {         
System.loadLibrary("Setdispdll");
Setp2:
cmd>javac Setdisp.java
Setp3:
cmd>javah Setdisp
Setp4:
/*Setdisp.c
* DO NOT EDIT THIS FILE - it is machine generated
#include <jni.h>
#include <windows.h>
/* Header for class Setdisp */
#ifndef IncludedSetdisp
#define IncludedSetdisp
#ifdef __cplusplus
extern "C" {
#endif
* Class: Setdisp
* Method: greeting
* Signature: ()V
JNIEXPORT void JNICALL Java_Setdisp_greeting
(JNIEnv * env, jclass cl) {
DEVMODE Mode;
EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &Mode);
Mode.dmPelsWidth = 800; //screen width
Mode.dmPelsHeight = 600; //screen height
Mode.dmDisplayFrequency =75; //screen bits
if (ChangeDisplaySettings(&Mode,CDS_TEST)==DISP_CHANGE_SUCCESSFUL)
ChangeDisplaySettings(&Mode, 0);
#ifdef __cplusplus
#endif
#endif
Setp5:
cmd>cl -IF:\jdk\include -IF:\jdk\include\win32 -LD Setdisp.c -FeSetdisp.dll
errors:
Setdisp.obj : error LNK2001: unresolved external symbol __imp__ChangeDisplaySett
ingsA@8
Setdisp.obj : error LNK2001: unresolved external symbol __imp__EnumDisplaySettin
gsA@12
Setdisp.dll : fatal error LNK1120: 2 unresolved externals
Why ??
Help me,thank you very much!

Answer 1

are you sure you are linking to user32.dll?